Drug Therapy

A highly active, water- and alcohol-soluble, basic pressor substance is formed when renin and renin-activator interact, for which we suggest the name “angiotonin.”

—Irvine H. Page and O.M. Helmer, 1940.¹

The renin-angiotensin-aldosterone system regulates salt and, in part, water homeostasis, and therefore blood pressure and fluid balance through its actions on the heart, kidneys, and blood vessels.² Drugs that target this system—angiotensin-converting enzyme (ACE) inhibitors and angiotensin II receptor blockers (ARBs)—are used primarily to treat hypertension and also to treat chronic kidney disease and heart failure with reduced ejection fraction.

See related editorial

Controlling blood pressure is important, as hypertension increases the risk of myocardial infarction, cerebrovascular events, and progression of chronic kidney disease, which itself is a risk factor for cardiovascular disease. However, the benefit of these drugs is only partly due to their effect on blood pressure. They also reduce proteinuria, which is a graded risk factor for progression of kidney disease as well as morbidity and death from vascular events.³

Despite the benefits of ACE inhibitors and ARBs, concern about their adverse effects—especially hyperkalemia and a decline in renal function—has led to their underuse in patients likely to derive the greatest benefit.³

ACE INHIBITORS AND ARBs

ACE inhibitors, as their name indicates, inhibit conversion of angiotensin I to angiotensin II by ACE, resulting in vasodilation of the efferent arteriole and a drop in blood pressure. Inhibition of ACE, a kininase, also results in a rise in kinins. One of these, bradykinin, is associated with some of the side effects of this class of drugs such as cough, which affects 5% to 20% of patients.⁴ Elevation of bradykinin is also believed to account for ACE inhibitor-induced angioedema, an uncommon but potentially serious side effect. Kinins are also associated with desirable effects such as lowering blood pressure, increasing insulin sensitivity, and dilating blood vessels.

ARBs were developed as an alternative for patients unable to tolerate the adverse effects of ACE inhibitors. While ACE inhibitors reduce the activity of angiotensin II at both the AT1 and AT2 receptors, ARBs block only the AT1 receptors, thereby inhibiting their vasoconstricting activity on smooth muscle. ARBs also raise the levels of renin, angiotensin I, and angiotensin II as a result of feedback inhibition. Angiotensin II is associated with release of inflammatory mediators such as tumor necrosis factor alpha, cytokines, and chemokines, the consequences of which are also inhibited by ARBs, further preventing renal fibrosis and scarring from chronic inflammation.³

What is the evidence supporting the use of ACE inhibitors and ARBs?

ACE inhibitors and ARBs, used singly, reduce blood pressure and proteinuria, slow progression of kidney disease, and improve outcomes in patients who have heart failure, diabetes mellitus, or a history of myocardial infarction.^5–11 

While dual blockade with the combination of an ACE inhibitor and an ARB lowers blood pressure and proteinuria to a greater degree than monotherapy, dual blockade has been associated with higher rates of complications, including hyperkalemia.^12–17

RISK FACTORS FOR HYPERKALEMIA

ACE inhibitors and ARBs raise potassium, especially when used in combination. Other risk factors for hyperkalemia include the following—and note that some of them are also indications for ACE inhibitors and ARBs:

Renal insufficiency. The kidneys are responsible for over 90% of potassium removal in healthy individuals,^18,19 and the lower the GFR, the higher the risk of hyperkalemia.^3,20,21

Heart failure

Diabetes mellitus^6,21–23

Endogenous potassium load due to hemolysis, rhabdomyolysis, insulin deficiency, lactic acidosis, or gastrointestinal bleeding

Exogenous potassium load due to dietary consumption or blood products

Other medications, eg, sacubitril-valsartan, aldosterone antagonists, mineralocorticoid receptor antagonists, potassium-sparing diuretics, beta-adrenergic antagonists, nonsteroidal anti-inflammatory drugs, heparin, cyclosporine, trimethoprim, digoxin

Hypertension

Hypoaldosteronism (including type 4 renal tubular acidosis)

Addison disease

Advanced age

Lower body mass index.

Both hypokalemia and hyperkalemia are associated with a higher risk of death,^20,21,24  but in patients with heart failure, the survival benefit from ACE inhibitors, ARBs, and mineralocorticoid receptor antagonists outweighs the risk of hyperkalemia.^25–27 Weir and Rolfe²⁸ concluded that patients with heart failure and chronic kidney disease are at greatest risk of hyperkalemia from renin-angiotensin-aldosterone system inhibition, but the increases in potassium levels are small (about 0.1 to 0.3 mmol/L) and unlikely to be clinically significant.

Hyperkalemia tends to recur. Einhorn et al²⁰ found that nearly half of patients with chronic kidney disease who had an episode of hyperkalemia had 1 or more recurrent episodes within a year.

 

 

ACE INHIBITORS, ARBs, ABD RENAL FUNCTION

Another concern about using ACE inhibitors and ARBs, especially in patients with chronic kidney disease, is that the serum creatinine level tends to rise when starting these drugs,²⁹ although several studies have shown that an acute rise in creatinine may demonstrate that the drug is actually protecting the kidney.^30,31 Hirsch³² described this phenomenon as “prerenal success,” proposing that the decline in GFR is hemodynamic, secondary to a fall in intraglomerular pressure as a result of efferent vasodilation, and therefore should not be reversed.

Schmidt et al,^33,34 in a study in 122,363 patients who began ACE inhibitor or ARB therapy, found that cardiorenal outcomes were worse, with higher rates of end-stage renal disease, myocardial infarction, heart failure, and death, in those in whom creatinine rose by 30% or more since starting treatment. This trend was also seen, to a lesser degree, in those with a smaller increase in creatinine, suggesting that even this group of patients should receive close monitoring.

Whether renin-angiotensin-aldosterone system inhibitors provide a benefit in advanced progressive chronic kidney disease remains unclear.^35–37  The Angiotensin Converting Enzyme Inhibitor (ACEi)/Angiotensin Receptor Blocker (ARB) Withdrawal in Advanced Renal Disease trial (STOP-ACEi),³⁸ currently under way, will provide valuable data to help close this gap in our knowledge. This open-label randomized controlled trial is testing the hypothesis that stopping ACE inhibitor or ARB treatment, or a combination of both, compared with continuing these treatments, will improve or stabilize renal function in patients with progressive stage 4 or 5 chronic kidney disease.

NEED FOR MONITORING

Taken together, the above data suggest close and regular monitoring is required in patients receiving these drugs. However, monitoring tends to be lax.^34,37,39 A 2017 study of adherence to the guidelines for monitoring serum creatinine and potassium after starting an ACE inhibitor or ARB and subsequent discontinuation found that fewer than 10% of patients had follow-up within the recommended 2 weeks after starting these drugs.³⁴ Most patients with a creatinine rise of 30% or more or a potassium level higher than 6.0 mmol/L continued treatment. There was also no evidence of increased monitoring in those deemed at higher risk of these complications.

WHAT DO THE GUIDELINES SUGGEST?

ACE inhibitors and ARBs in chronic kidney disease and hypertension

Target blood pressures vary in guidelines from different organizations.^4,40–45 The 2017 joint guidelines of the American College of Cardiology and American Heart Association (ACC/AHA)⁴⁰ recommend a target blood pressure of 130/80 mm Hg or less in all patients irrespective of the level of proteinuria and whether they have diabetes mellitus, based on several studies.^46–48 In the elderly, other factors such as the risk of hypotension and falls must be taken into consideration in establishing the most appropriate blood pressure target.

In general, a renin-angiotensin-aldosterone system inhibitor is recommended if the patient has diabetes, stage 1, 2, or 3 chronic kidney disease, or proteinuria. For example, the guidelines recommend a renin-angiotensin-aldosterone system inhibitor in diabetic patients with albuminuria.

None of the guidelines recommend routine use of combination therapy.

ACE inhibitors and ARBs in heart failure

The 2017 ACC/AHA and Heart Failure Society of America (HFSA) guidelines for heart failure⁴⁹ recommend an ACE inhibitor or ARB for patients with stage C (symptomatic) heart failure with reduced ejection fraction, in view of the known cardiovascular morbidity and mortality benefits.

The European Society of Cardiology⁵⁰ recommends ACE inhibitors for patients with symptomatic heart failure with reduced ejection fraction, as well as those with asymptomatic left ventricular systolic dysfunction. In patients with stable coronary artery disease, an ACE inhibitor should be considered even with normal left ventricular function.

ARBs should be used as alternatives in those unable to tolerate ACE inhibitors.

Combination therapy should be avoided due to the increased risk of renal impairment and hyperkalemia but may be considered in patients with heart failure and reduced ejection fraction in whom other treatments are unsuitable. These include patients on beta-blockers who cannot tolerate mineralocorticoid receptor antagonists such as spironolactone. Combination therapy should be done only under strict supervision.⁵⁰

 

 

Starting ACE or ARB therapy

Close monitoring of serum potassium is recommended during ACE inhibitor or ARB use. Those at greatest risk of hyperkalemia include elderly patients, those taking other medications associated with hyperkalemia, and diabetic patients, because of their higher risk of renovascular disease.

Caution is advised when starting ACE inhibitor or ARB therapy in these high-risk groups as well as in patients with potassium levels higher than 5.0 mmol/L at baseline, at high risk of prerenal acute kidney injury, with known renal insufficiency, and with previous deterioration in renal function on these medications.^3,41,51

Before starting therapy, ensure that patients are volume-replete and measure baseline serum electrolytes and creatinine.^41,51

The ACC/AHA and HFSA recommend starting at a low dose and titrating upward slowly. If maximal doses are not tolerated, then a lower dose should be maintained.⁴⁹ The European Society of Cardiology guidelines⁵² suggest increasing the dose at no less than every 2 weeks unless in an inpatient setting. Blood testing should be done 7 to 14 days after starting therapy, after any titration in dosage, and every 4 months thereafter.⁵³

The guidelines generally agree that a rise in creatinine of up to 30% and a fall in eGFR of up to 25% is acceptable, with the need for regular monitoring, particularly in high-risk groups.^{40–42,51,52}

What if serum potassium or creatinine rises during treatment?

If hyperkalemia arises or renal function declines by a significant amount, one should first address contributing factors. If no improvement is seen, then the dose of the ACE inhibitor or ARB should be reduced by 50% and blood work repeated in 1 to 2 weeks. If the laboratory values do not return to an acceptable level, reducing the dose further or stopping the drug is advised.

Give dietary advice to all patients with chronic kidney disease being considered for a renin-angiotensin-aldosterone system inhibitor or for an increase in dose with a potassium level higher than 4.5 mmol/L. A low-potassium diet should aim for potassium intake of less than 50 or 75 mmol/day and sodium intake of less than 60 mmol/day for hypertensive patients with chronic kidney disease.

Review the patient’s medications if the baseline potassium level is higher than 5.0 mmol/L. Consider stopping potassium-sparing agents, digoxin, trimethoprim, and nonsteroidal anti-inflammatory drugs. Also think about starting a non–potassium-sparing diuretic as well as sodium bicarbonate to reduce potassium levels. Blood work should be repeated within 2 weeks after these changes.

Do not start a renin-angiotensin-aldosterone system inhibitor, or do not increase the dose, if the potassium level is elevated until measures have been taken to reduce the degree of hyperkalemia.⁵¹

In renal transplant recipients, renin-angiotensin-aldosterone system inhibitors are often preferred to manage hypertension in those who have proteinuria or cardiovascular disease. However, the risk of hyperkalemia is also greater with concomitant use of immunosuppressive drugs such as tacrolimus and cyclosporine. Management of complications should be approached according to guidelines discussed above.⁵¹

Monitor renal function, potassium. The National Institute for Health and Care Excellence guideline⁵⁴ advocates that baseline renal function testing should be followed by repeat blood testing 1 to 2 weeks after starting renin-angiotensin-aldosterone system inhibitors in patients with ischemic heart disease. The advice is similar when starting therapy in patients with chronic heart failure, emphasizing the need to monitor after each dose increment and to use clinical judgment when deciding to start treatment. The AHA advises caution in patients with renal insufficiency or a potassium level above 5.0 mmol/L.⁴⁹

Sick day rules. The National Institute for Health and Care Excellence encourages discussing “sick day rules” with patients starting renin-angiotensin-aldosterone system inhibitors. This means patients should be advised to temporarily stop taking nephrotoxic medications, including over-the-counter nonsteroidal anti-inflammatory drugs, in any potential state of illness or dehydration, such as diarrhea and vomiting. There is, however, little evidence that this advice can actually reduce the incidence of acute kidney injury.^55,56

OUR RECOMMENDATIONS

Our advice for managing patients receiving ACE inhibitors or ARBs is summarized in Table 1.

A highly active, water- and alcohol-soluble, basic pressor substance is formed when renin and renin-activator interact, for which we suggest the name “angiotonin.”

—Irvine H. Page and O.M. Helmer, 1940.¹

The renin-angiotensin-aldosterone system regulates salt and, in part, water homeostasis, and therefore blood pressure and fluid balance through its actions on the heart, kidneys, and blood vessels.² Drugs that target this system—angiotensin-converting enzyme (ACE) inhibitors and angiotensin II receptor blockers (ARBs)—are used primarily to treat hypertension and also to treat chronic kidney disease and heart failure with reduced ejection fraction.

See related editorial

Controlling blood pressure is important, as hypertension increases the risk of myocardial infarction, cerebrovascular events, and progression of chronic kidney disease, which itself is a risk factor for cardiovascular disease. However, the benefit of these drugs is only partly due to their effect on blood pressure. They also reduce proteinuria, which is a graded risk factor for progression of kidney disease as well as morbidity and death from vascular events.³

Despite the benefits of ACE inhibitors and ARBs, concern about their adverse effects—especially hyperkalemia and a decline in renal function—has led to their underuse in patients likely to derive the greatest benefit.³

ACE INHIBITORS AND ARBs

ACE inhibitors, as their name indicates, inhibit conversion of angiotensin I to angiotensin II by ACE, resulting in vasodilation of the efferent arteriole and a drop in blood pressure. Inhibition of ACE, a kininase, also results in a rise in kinins. One of these, bradykinin, is associated with some of the side effects of this class of drugs such as cough, which affects 5% to 20% of patients.⁴ Elevation of bradykinin is also believed to account for ACE inhibitor-induced angioedema, an uncommon but potentially serious side effect. Kinins are also associated with desirable effects such as lowering blood pressure, increasing insulin sensitivity, and dilating blood vessels.

ARBs were developed as an alternative for patients unable to tolerate the adverse effects of ACE inhibitors. While ACE inhibitors reduce the activity of angiotensin II at both the AT1 and AT2 receptors, ARBs block only the AT1 receptors, thereby inhibiting their vasoconstricting activity on smooth muscle. ARBs also raise the levels of renin, angiotensin I, and angiotensin II as a result of feedback inhibition. Angiotensin II is associated with release of inflammatory mediators such as tumor necrosis factor alpha, cytokines, and chemokines, the consequences of which are also inhibited by ARBs, further preventing renal fibrosis and scarring from chronic inflammation.³

What is the evidence supporting the use of ACE inhibitors and ARBs?

ACE inhibitors and ARBs, used singly, reduce blood pressure and proteinuria, slow progression of kidney disease, and improve outcomes in patients who have heart failure, diabetes mellitus, or a history of myocardial infarction.^5–11 

While dual blockade with the combination of an ACE inhibitor and an ARB lowers blood pressure and proteinuria to a greater degree than monotherapy, dual blockade has been associated with higher rates of complications, including hyperkalemia.^12–17

RISK FACTORS FOR HYPERKALEMIA

ACE inhibitors and ARBs raise potassium, especially when used in combination. Other risk factors for hyperkalemia include the following—and note that some of them are also indications for ACE inhibitors and ARBs:

Renal insufficiency. The kidneys are responsible for over 90% of potassium removal in healthy individuals,^18,19 and the lower the GFR, the higher the risk of hyperkalemia.^3,20,21

Heart failure

Diabetes mellitus^6,21–23

Endogenous potassium load due to hemolysis, rhabdomyolysis, insulin deficiency, lactic acidosis, or gastrointestinal bleeding

Exogenous potassium load due to dietary consumption or blood products

Other medications, eg, sacubitril-valsartan, aldosterone antagonists, mineralocorticoid receptor antagonists, potassium-sparing diuretics, beta-adrenergic antagonists, nonsteroidal anti-inflammatory drugs, heparin, cyclosporine, trimethoprim, digoxin

Hypertension

Hypoaldosteronism (including type 4 renal tubular acidosis)

Addison disease

Advanced age

Lower body mass index.

Both hypokalemia and hyperkalemia are associated with a higher risk of death,^20,21,24  but in patients with heart failure, the survival benefit from ACE inhibitors, ARBs, and mineralocorticoid receptor antagonists outweighs the risk of hyperkalemia.^25–27 Weir and Rolfe²⁸ concluded that patients with heart failure and chronic kidney disease are at greatest risk of hyperkalemia from renin-angiotensin-aldosterone system inhibition, but the increases in potassium levels are small (about 0.1 to 0.3 mmol/L) and unlikely to be clinically significant.

Hyperkalemia tends to recur. Einhorn et al²⁰ found that nearly half of patients with chronic kidney disease who had an episode of hyperkalemia had 1 or more recurrent episodes within a year.

 

 

ACE INHIBITORS, ARBs, ABD RENAL FUNCTION

Another concern about using ACE inhibitors and ARBs, especially in patients with chronic kidney disease, is that the serum creatinine level tends to rise when starting these drugs,²⁹ although several studies have shown that an acute rise in creatinine may demonstrate that the drug is actually protecting the kidney.^30,31 Hirsch³² described this phenomenon as “prerenal success,” proposing that the decline in GFR is hemodynamic, secondary to a fall in intraglomerular pressure as a result of efferent vasodilation, and therefore should not be reversed.

Schmidt et al,^33,34 in a study in 122,363 patients who began ACE inhibitor or ARB therapy, found that cardiorenal outcomes were worse, with higher rates of end-stage renal disease, myocardial infarction, heart failure, and death, in those in whom creatinine rose by 30% or more since starting treatment. This trend was also seen, to a lesser degree, in those with a smaller increase in creatinine, suggesting that even this group of patients should receive close monitoring.

Whether renin-angiotensin-aldosterone system inhibitors provide a benefit in advanced progressive chronic kidney disease remains unclear.^35–37  The Angiotensin Converting Enzyme Inhibitor (ACEi)/Angiotensin Receptor Blocker (ARB) Withdrawal in Advanced Renal Disease trial (STOP-ACEi),³⁸ currently under way, will provide valuable data to help close this gap in our knowledge. This open-label randomized controlled trial is testing the hypothesis that stopping ACE inhibitor or ARB treatment, or a combination of both, compared with continuing these treatments, will improve or stabilize renal function in patients with progressive stage 4 or 5 chronic kidney disease.

NEED FOR MONITORING

Taken together, the above data suggest close and regular monitoring is required in patients receiving these drugs. However, monitoring tends to be lax.^34,37,39 A 2017 study of adherence to the guidelines for monitoring serum creatinine and potassium after starting an ACE inhibitor or ARB and subsequent discontinuation found that fewer than 10% of patients had follow-up within the recommended 2 weeks after starting these drugs.³⁴ Most patients with a creatinine rise of 30% or more or a potassium level higher than 6.0 mmol/L continued treatment. There was also no evidence of increased monitoring in those deemed at higher risk of these complications.

WHAT DO THE GUIDELINES SUGGEST?

ACE inhibitors and ARBs in chronic kidney disease and hypertension

Target blood pressures vary in guidelines from different organizations.^4,40–45 The 2017 joint guidelines of the American College of Cardiology and American Heart Association (ACC/AHA)⁴⁰ recommend a target blood pressure of 130/80 mm Hg or less in all patients irrespective of the level of proteinuria and whether they have diabetes mellitus, based on several studies.^46–48 In the elderly, other factors such as the risk of hypotension and falls must be taken into consideration in establishing the most appropriate blood pressure target.

In general, a renin-angiotensin-aldosterone system inhibitor is recommended if the patient has diabetes, stage 1, 2, or 3 chronic kidney disease, or proteinuria. For example, the guidelines recommend a renin-angiotensin-aldosterone system inhibitor in diabetic patients with albuminuria.

None of the guidelines recommend routine use of combination therapy.

ACE inhibitors and ARBs in heart failure

The 2017 ACC/AHA and Heart Failure Society of America (HFSA) guidelines for heart failure⁴⁹ recommend an ACE inhibitor or ARB for patients with stage C (symptomatic) heart failure with reduced ejection fraction, in view of the known cardiovascular morbidity and mortality benefits.

The European Society of Cardiology⁵⁰ recommends ACE inhibitors for patients with symptomatic heart failure with reduced ejection fraction, as well as those with asymptomatic left ventricular systolic dysfunction. In patients with stable coronary artery disease, an ACE inhibitor should be considered even with normal left ventricular function.

ARBs should be used as alternatives in those unable to tolerate ACE inhibitors.

Combination therapy should be avoided due to the increased risk of renal impairment and hyperkalemia but may be considered in patients with heart failure and reduced ejection fraction in whom other treatments are unsuitable. These include patients on beta-blockers who cannot tolerate mineralocorticoid receptor antagonists such as spironolactone. Combination therapy should be done only under strict supervision.⁵⁰

 

 

Starting ACE or ARB therapy

Close monitoring of serum potassium is recommended during ACE inhibitor or ARB use. Those at greatest risk of hyperkalemia include elderly patients, those taking other medications associated with hyperkalemia, and diabetic patients, because of their higher risk of renovascular disease.

Caution is advised when starting ACE inhibitor or ARB therapy in these high-risk groups as well as in patients with potassium levels higher than 5.0 mmol/L at baseline, at high risk of prerenal acute kidney injury, with known renal insufficiency, and with previous deterioration in renal function on these medications.^3,41,51

Before starting therapy, ensure that patients are volume-replete and measure baseline serum electrolytes and creatinine.^41,51

The ACC/AHA and HFSA recommend starting at a low dose and titrating upward slowly. If maximal doses are not tolerated, then a lower dose should be maintained.⁴⁹ The European Society of Cardiology guidelines⁵² suggest increasing the dose at no less than every 2 weeks unless in an inpatient setting. Blood testing should be done 7 to 14 days after starting therapy, after any titration in dosage, and every 4 months thereafter.⁵³

The guidelines generally agree that a rise in creatinine of up to 30% and a fall in eGFR of up to 25% is acceptable, with the need for regular monitoring, particularly in high-risk groups.^{40–42,51,52}

What if serum potassium or creatinine rises during treatment?

If hyperkalemia arises or renal function declines by a significant amount, one should first address contributing factors. If no improvement is seen, then the dose of the ACE inhibitor or ARB should be reduced by 50% and blood work repeated in 1 to 2 weeks. If the laboratory values do not return to an acceptable level, reducing the dose further or stopping the drug is advised.

Give dietary advice to all patients with chronic kidney disease being considered for a renin-angiotensin-aldosterone system inhibitor or for an increase in dose with a potassium level higher than 4.5 mmol/L. A low-potassium diet should aim for potassium intake of less than 50 or 75 mmol/day and sodium intake of less than 60 mmol/day for hypertensive patients with chronic kidney disease.

Review the patient’s medications if the baseline potassium level is higher than 5.0 mmol/L. Consider stopping potassium-sparing agents, digoxin, trimethoprim, and nonsteroidal anti-inflammatory drugs. Also think about starting a non–potassium-sparing diuretic as well as sodium bicarbonate to reduce potassium levels. Blood work should be repeated within 2 weeks after these changes.

Do not start a renin-angiotensin-aldosterone system inhibitor, or do not increase the dose, if the potassium level is elevated until measures have been taken to reduce the degree of hyperkalemia.⁵¹

In renal transplant recipients, renin-angiotensin-aldosterone system inhibitors are often preferred to manage hypertension in those who have proteinuria or cardiovascular disease. However, the risk of hyperkalemia is also greater with concomitant use of immunosuppressive drugs such as tacrolimus and cyclosporine. Management of complications should be approached according to guidelines discussed above.⁵¹

Monitor renal function, potassium. The National Institute for Health and Care Excellence guideline⁵⁴ advocates that baseline renal function testing should be followed by repeat blood testing 1 to 2 weeks after starting renin-angiotensin-aldosterone system inhibitors in patients with ischemic heart disease. The advice is similar when starting therapy in patients with chronic heart failure, emphasizing the need to monitor after each dose increment and to use clinical judgment when deciding to start treatment. The AHA advises caution in patients with renal insufficiency or a potassium level above 5.0 mmol/L.⁴⁹

Sick day rules. The National Institute for Health and Care Excellence encourages discussing “sick day rules” with patients starting renin-angiotensin-aldosterone system inhibitors. This means patients should be advised to temporarily stop taking nephrotoxic medications, including over-the-counter nonsteroidal anti-inflammatory drugs, in any potential state of illness or dehydration, such as diarrhea and vomiting. There is, however, little evidence that this advice can actually reduce the incidence of acute kidney injury.^55,56

OUR RECOMMENDATIONS

Our advice for managing patients receiving ACE inhibitors or ARBs is summarized in Table 1.

A highly active, water- and alcohol-soluble, basic pressor substance is formed when renin and renin-activator interact, for which we suggest the name “angiotonin.”

—Irvine H. Page and O.M. Helmer, 1940.¹

The renin-angiotensin-aldosterone system regulates salt and, in part, water homeostasis, and therefore blood pressure and fluid balance through its actions on the heart, kidneys, and blood vessels.² Drugs that target this system—angiotensin-converting enzyme (ACE) inhibitors and angiotensin II receptor blockers (ARBs)—are used primarily to treat hypertension and also to treat chronic kidney disease and heart failure with reduced ejection fraction.

See related editorial

Controlling blood pressure is important, as hypertension increases the risk of myocardial infarction, cerebrovascular events, and progression of chronic kidney disease, which itself is a risk factor for cardiovascular disease. However, the benefit of these drugs is only partly due to their effect on blood pressure. They also reduce proteinuria, which is a graded risk factor for progression of kidney disease as well as morbidity and death from vascular events.³

Despite the benefits of ACE inhibitors and ARBs, concern about their adverse effects—especially hyperkalemia and a decline in renal function—has led to their underuse in patients likely to derive the greatest benefit.³

ACE INHIBITORS AND ARBs

ACE inhibitors, as their name indicates, inhibit conversion of angiotensin I to angiotensin II by ACE, resulting in vasodilation of the efferent arteriole and a drop in blood pressure. Inhibition of ACE, a kininase, also results in a rise in kinins. One of these, bradykinin, is associated with some of the side effects of this class of drugs such as cough, which affects 5% to 20% of patients.⁴ Elevation of bradykinin is also believed to account for ACE inhibitor-induced angioedema, an uncommon but potentially serious side effect. Kinins are also associated with desirable effects such as lowering blood pressure, increasing insulin sensitivity, and dilating blood vessels.

ARBs were developed as an alternative for patients unable to tolerate the adverse effects of ACE inhibitors. While ACE inhibitors reduce the activity of angiotensin II at both the AT1 and AT2 receptors, ARBs block only the AT1 receptors, thereby inhibiting their vasoconstricting activity on smooth muscle. ARBs also raise the levels of renin, angiotensin I, and angiotensin II as a result of feedback inhibition. Angiotensin II is associated with release of inflammatory mediators such as tumor necrosis factor alpha, cytokines, and chemokines, the consequences of which are also inhibited by ARBs, further preventing renal fibrosis and scarring from chronic inflammation.³

What is the evidence supporting the use of ACE inhibitors and ARBs?

ACE inhibitors and ARBs, used singly, reduce blood pressure and proteinuria, slow progression of kidney disease, and improve outcomes in patients who have heart failure, diabetes mellitus, or a history of myocardial infarction.^5–11 

While dual blockade with the combination of an ACE inhibitor and an ARB lowers blood pressure and proteinuria to a greater degree than monotherapy, dual blockade has been associated with higher rates of complications, including hyperkalemia.^12–17

RISK FACTORS FOR HYPERKALEMIA

ACE inhibitors and ARBs raise potassium, especially when used in combination. Other risk factors for hyperkalemia include the following—and note that some of them are also indications for ACE inhibitors and ARBs:

Renal insufficiency. The kidneys are responsible for over 90% of potassium removal in healthy individuals,^18,19 and the lower the GFR, the higher the risk of hyperkalemia.^3,20,21

Heart failure

Diabetes mellitus^6,21–23

Endogenous potassium load due to hemolysis, rhabdomyolysis, insulin deficiency, lactic acidosis, or gastrointestinal bleeding

Exogenous potassium load due to dietary consumption or blood products

Other medications, eg, sacubitril-valsartan, aldosterone antagonists, mineralocorticoid receptor antagonists, potassium-sparing diuretics, beta-adrenergic antagonists, nonsteroidal anti-inflammatory drugs, heparin, cyclosporine, trimethoprim, digoxin

Hypertension

Hypoaldosteronism (including type 4 renal tubular acidosis)

Addison disease

Advanced age

Lower body mass index.

Both hypokalemia and hyperkalemia are associated with a higher risk of death,^20,21,24  but in patients with heart failure, the survival benefit from ACE inhibitors, ARBs, and mineralocorticoid receptor antagonists outweighs the risk of hyperkalemia.^25–27 Weir and Rolfe²⁸ concluded that patients with heart failure and chronic kidney disease are at greatest risk of hyperkalemia from renin-angiotensin-aldosterone system inhibition, but the increases in potassium levels are small (about 0.1 to 0.3 mmol/L) and unlikely to be clinically significant.

Hyperkalemia tends to recur. Einhorn et al²⁰ found that nearly half of patients with chronic kidney disease who had an episode of hyperkalemia had 1 or more recurrent episodes within a year.

 

 

ACE INHIBITORS, ARBs, ABD RENAL FUNCTION

Another concern about using ACE inhibitors and ARBs, especially in patients with chronic kidney disease, is that the serum creatinine level tends to rise when starting these drugs,²⁹ although several studies have shown that an acute rise in creatinine may demonstrate that the drug is actually protecting the kidney.^30,31 Hirsch³² described this phenomenon as “prerenal success,” proposing that the decline in GFR is hemodynamic, secondary to a fall in intraglomerular pressure as a result of efferent vasodilation, and therefore should not be reversed.

Schmidt et al,^33,34 in a study in 122,363 patients who began ACE inhibitor or ARB therapy, found that cardiorenal outcomes were worse, with higher rates of end-stage renal disease, myocardial infarction, heart failure, and death, in those in whom creatinine rose by 30% or more since starting treatment. This trend was also seen, to a lesser degree, in those with a smaller increase in creatinine, suggesting that even this group of patients should receive close monitoring.

Whether renin-angiotensin-aldosterone system inhibitors provide a benefit in advanced progressive chronic kidney disease remains unclear.^35–37  The Angiotensin Converting Enzyme Inhibitor (ACEi)/Angiotensin Receptor Blocker (ARB) Withdrawal in Advanced Renal Disease trial (STOP-ACEi),³⁸ currently under way, will provide valuable data to help close this gap in our knowledge. This open-label randomized controlled trial is testing the hypothesis that stopping ACE inhibitor or ARB treatment, or a combination of both, compared with continuing these treatments, will improve or stabilize renal function in patients with progressive stage 4 or 5 chronic kidney disease.

NEED FOR MONITORING

Taken together, the above data suggest close and regular monitoring is required in patients receiving these drugs. However, monitoring tends to be lax.^34,37,39 A 2017 study of adherence to the guidelines for monitoring serum creatinine and potassium after starting an ACE inhibitor or ARB and subsequent discontinuation found that fewer than 10% of patients had follow-up within the recommended 2 weeks after starting these drugs.³⁴ Most patients with a creatinine rise of 30% or more or a potassium level higher than 6.0 mmol/L continued treatment. There was also no evidence of increased monitoring in those deemed at higher risk of these complications.

WHAT DO THE GUIDELINES SUGGEST?

ACE inhibitors and ARBs in chronic kidney disease and hypertension

Target blood pressures vary in guidelines from different organizations.^4,40–45 The 2017 joint guidelines of the American College of Cardiology and American Heart Association (ACC/AHA)⁴⁰ recommend a target blood pressure of 130/80 mm Hg or less in all patients irrespective of the level of proteinuria and whether they have diabetes mellitus, based on several studies.^46–48 In the elderly, other factors such as the risk of hypotension and falls must be taken into consideration in establishing the most appropriate blood pressure target.

In general, a renin-angiotensin-aldosterone system inhibitor is recommended if the patient has diabetes, stage 1, 2, or 3 chronic kidney disease, or proteinuria. For example, the guidelines recommend a renin-angiotensin-aldosterone system inhibitor in diabetic patients with albuminuria.

None of the guidelines recommend routine use of combination therapy.

ACE inhibitors and ARBs in heart failure

The 2017 ACC/AHA and Heart Failure Society of America (HFSA) guidelines for heart failure⁴⁹ recommend an ACE inhibitor or ARB for patients with stage C (symptomatic) heart failure with reduced ejection fraction, in view of the known cardiovascular morbidity and mortality benefits.

The European Society of Cardiology⁵⁰ recommends ACE inhibitors for patients with symptomatic heart failure with reduced ejection fraction, as well as those with asymptomatic left ventricular systolic dysfunction. In patients with stable coronary artery disease, an ACE inhibitor should be considered even with normal left ventricular function.

ARBs should be used as alternatives in those unable to tolerate ACE inhibitors.

Combination therapy should be avoided due to the increased risk of renal impairment and hyperkalemia but may be considered in patients with heart failure and reduced ejection fraction in whom other treatments are unsuitable. These include patients on beta-blockers who cannot tolerate mineralocorticoid receptor antagonists such as spironolactone. Combination therapy should be done only under strict supervision.⁵⁰

 

 

Starting ACE or ARB therapy

Close monitoring of serum potassium is recommended during ACE inhibitor or ARB use. Those at greatest risk of hyperkalemia include elderly patients, those taking other medications associated with hyperkalemia, and diabetic patients, because of their higher risk of renovascular disease.

Caution is advised when starting ACE inhibitor or ARB therapy in these high-risk groups as well as in patients with potassium levels higher than 5.0 mmol/L at baseline, at high risk of prerenal acute kidney injury, with known renal insufficiency, and with previous deterioration in renal function on these medications.^3,41,51

Before starting therapy, ensure that patients are volume-replete and measure baseline serum electrolytes and creatinine.^41,51

The ACC/AHA and HFSA recommend starting at a low dose and titrating upward slowly. If maximal doses are not tolerated, then a lower dose should be maintained.⁴⁹ The European Society of Cardiology guidelines⁵² suggest increasing the dose at no less than every 2 weeks unless in an inpatient setting. Blood testing should be done 7 to 14 days after starting therapy, after any titration in dosage, and every 4 months thereafter.⁵³

The guidelines generally agree that a rise in creatinine of up to 30% and a fall in eGFR of up to 25% is acceptable, with the need for regular monitoring, particularly in high-risk groups.^{40–42,51,52}

What if serum potassium or creatinine rises during treatment?

If hyperkalemia arises or renal function declines by a significant amount, one should first address contributing factors. If no improvement is seen, then the dose of the ACE inhibitor or ARB should be reduced by 50% and blood work repeated in 1 to 2 weeks. If the laboratory values do not return to an acceptable level, reducing the dose further or stopping the drug is advised.

Give dietary advice to all patients with chronic kidney disease being considered for a renin-angiotensin-aldosterone system inhibitor or for an increase in dose with a potassium level higher than 4.5 mmol/L. A low-potassium diet should aim for potassium intake of less than 50 or 75 mmol/day and sodium intake of less than 60 mmol/day for hypertensive patients with chronic kidney disease.

Review the patient’s medications if the baseline potassium level is higher than 5.0 mmol/L. Consider stopping potassium-sparing agents, digoxin, trimethoprim, and nonsteroidal anti-inflammatory drugs. Also think about starting a non–potassium-sparing diuretic as well as sodium bicarbonate to reduce potassium levels. Blood work should be repeated within 2 weeks after these changes.

Do not start a renin-angiotensin-aldosterone system inhibitor, or do not increase the dose, if the potassium level is elevated until measures have been taken to reduce the degree of hyperkalemia.⁵¹

In renal transplant recipients, renin-angiotensin-aldosterone system inhibitors are often preferred to manage hypertension in those who have proteinuria or cardiovascular disease. However, the risk of hyperkalemia is also greater with concomitant use of immunosuppressive drugs such as tacrolimus and cyclosporine. Management of complications should be approached according to guidelines discussed above.⁵¹

Monitor renal function, potassium. The National Institute for Health and Care Excellence guideline⁵⁴ advocates that baseline renal function testing should be followed by repeat blood testing 1 to 2 weeks after starting renin-angiotensin-aldosterone system inhibitors in patients with ischemic heart disease. The advice is similar when starting therapy in patients with chronic heart failure, emphasizing the need to monitor after each dose increment and to use clinical judgment when deciding to start treatment. The AHA advises caution in patients with renal insufficiency or a potassium level above 5.0 mmol/L.⁴⁹

Sick day rules. The National Institute for Health and Care Excellence encourages discussing “sick day rules” with patients starting renin-angiotensin-aldosterone system inhibitors. This means patients should be advised to temporarily stop taking nephrotoxic medications, including over-the-counter nonsteroidal anti-inflammatory drugs, in any potential state of illness or dehydration, such as diarrhea and vomiting. There is, however, little evidence that this advice can actually reduce the incidence of acute kidney injury.^55,56

OUR RECOMMENDATIONS

Our advice for managing patients receiving ACE inhibitors or ARBs is summarized in Table 1.

PARIS – For patients with peripheral artery disease, statin therapy is a literal lifeline, nearly halving mortality risk, according to new research presented at the annual congress of the European Society of Cardiology.

Patients with peripheral manifestations of cardiovascular disease “are a population with an extremely high risk to suffer a heart attack or a stroke,” said Joern Dopheide, MD, during a press conference at the meeting. Despite the known benefits of statins, including the reduction of all-cause and cardiovascular death and the reduction of morbidity, adherence to guideline-directed statin therapy is far from optimal, said Dr. Dopheide of Bern (Switzerland) University Hospital.

Patients with peripheral artery disease (PAD) not taking statins had a mortality rate of 34%, more than three times that of patients adherent to an intensified statin regimen. More surprisingly, patients who had been on a statin and then stopped the medication also had a mortality rate of 33%, indistinguishable from those who had never been treated with a statin.

Although statin adherence is low in general, it’s especially low in patients with PAD, said Dr. Dopheide. Still, he said, “few systematic data exist on the prognostic value of statin adherence and the correlation between adherence and cardiovascular outcome in PAD patients.”

Accordingly, Dr. Dopheide and his coinvestigators sought to determine the association between statin adherence and survival in PAD patients. The researchers obtained baseline and follow-up data for a cohort of 691 symptomatic PAD patients seen at a single site, looking at statin dosage, LDL cholesterol levels, and survival.

The patients were followed for a period of 50 months. Dr. Dopheide said that “Over the time course, we were able to increase the statin adherence from about 73% to about 81%, and parallel to that, we were able to reduce the LDL cholesterol levels from about 97 to 83 mg/dL, and we were able to increase the intensity of patients on statin therapy.”

Dr. Dopheide said that he and his colleagues saw a dose-response effect, so that the biggest drop in cholesterol was seen in patients on high statin doses, on more potent statins, or both.

Intensity was increased in some cases by upping statin dose – the mean statin dose climbed from 50 to 58 mg daily during the study period. An alternative strategy was to switch to a more potent statin such as atorvastatin or rosuvastatin; sometimes both intensity and dose were boosted.

“We were able to see that patients who were always on their statin therapy had a pretty low mortality rate of about 20%,” a figure that was halved for patients on more intensive statin therapy, who had a mortality rate of 10% across the study period, said Dr. Dopheide. “Patients in whom we started a statin therapy still profited from it, and had only a 15% mortality,” he added.

Some of the most surprising – and disturbing – study findings involved those who reduced their statin dose: “When patients discontinued their usual dose and decreased it, they suffered an even higher mortality rate, of nearly 43%. So that was kind of surprising and shocking to us.”

Identifying these high-risk patients and keeping them adherent is a substantial clinical challenge, but an important goal, said Dr. Dopheide. “We know that patients with peripheral arterial disease are a little more underrepresented in daily practice; it’s hard to identify them, especially when they are asymptomatic,” he acknowledged. However, once a PAD patient is identified, “One should at least keep the patient on the statin dosage they have,” or initiate statins if needed.

Further, warned Dr. Dopheide, “One should never discontinue statin or decrease the dosage,” adding that PAD patients should be informed that they are at “very high risk for myocardial infarction or stroke.” These patients “should regard their statin therapy as one of the most important and life-saving medications they can take,” he said.

Dr. Dopheide reported no outside sources of funding and no conflicts of interest.

koakes@mdedge.com

SOURCE: Dopheide, J., et al. ESC Congress 2019, Abstract P5363.

PARIS – For patients with peripheral artery disease, statin therapy is a literal lifeline, nearly halving mortality risk, according to new research presented at the annual congress of the European Society of Cardiology.

Patients with peripheral manifestations of cardiovascular disease “are a population with an extremely high risk to suffer a heart attack or a stroke,” said Joern Dopheide, MD, during a press conference at the meeting. Despite the known benefits of statins, including the reduction of all-cause and cardiovascular death and the reduction of morbidity, adherence to guideline-directed statin therapy is far from optimal, said Dr. Dopheide of Bern (Switzerland) University Hospital.

Patients with peripheral artery disease (PAD) not taking statins had a mortality rate of 34%, more than three times that of patients adherent to an intensified statin regimen. More surprisingly, patients who had been on a statin and then stopped the medication also had a mortality rate of 33%, indistinguishable from those who had never been treated with a statin.

Although statin adherence is low in general, it’s especially low in patients with PAD, said Dr. Dopheide. Still, he said, “few systematic data exist on the prognostic value of statin adherence and the correlation between adherence and cardiovascular outcome in PAD patients.”

Accordingly, Dr. Dopheide and his coinvestigators sought to determine the association between statin adherence and survival in PAD patients. The researchers obtained baseline and follow-up data for a cohort of 691 symptomatic PAD patients seen at a single site, looking at statin dosage, LDL cholesterol levels, and survival.

The patients were followed for a period of 50 months. Dr. Dopheide said that “Over the time course, we were able to increase the statin adherence from about 73% to about 81%, and parallel to that, we were able to reduce the LDL cholesterol levels from about 97 to 83 mg/dL, and we were able to increase the intensity of patients on statin therapy.”

Dr. Dopheide said that he and his colleagues saw a dose-response effect, so that the biggest drop in cholesterol was seen in patients on high statin doses, on more potent statins, or both.

Intensity was increased in some cases by upping statin dose – the mean statin dose climbed from 50 to 58 mg daily during the study period. An alternative strategy was to switch to a more potent statin such as atorvastatin or rosuvastatin; sometimes both intensity and dose were boosted.

“We were able to see that patients who were always on their statin therapy had a pretty low mortality rate of about 20%,” a figure that was halved for patients on more intensive statin therapy, who had a mortality rate of 10% across the study period, said Dr. Dopheide. “Patients in whom we started a statin therapy still profited from it, and had only a 15% mortality,” he added.

Some of the most surprising – and disturbing – study findings involved those who reduced their statin dose: “When patients discontinued their usual dose and decreased it, they suffered an even higher mortality rate, of nearly 43%. So that was kind of surprising and shocking to us.”

Identifying these high-risk patients and keeping them adherent is a substantial clinical challenge, but an important goal, said Dr. Dopheide. “We know that patients with peripheral arterial disease are a little more underrepresented in daily practice; it’s hard to identify them, especially when they are asymptomatic,” he acknowledged. However, once a PAD patient is identified, “One should at least keep the patient on the statin dosage they have,” or initiate statins if needed.

Further, warned Dr. Dopheide, “One should never discontinue statin or decrease the dosage,” adding that PAD patients should be informed that they are at “very high risk for myocardial infarction or stroke.” These patients “should regard their statin therapy as one of the most important and life-saving medications they can take,” he said.

Dr. Dopheide reported no outside sources of funding and no conflicts of interest.

koakes@mdedge.com

SOURCE: Dopheide, J., et al. ESC Congress 2019, Abstract P5363.

PARIS – For patients with peripheral artery disease, statin therapy is a literal lifeline, nearly halving mortality risk, according to new research presented at the annual congress of the European Society of Cardiology.

Patients with peripheral manifestations of cardiovascular disease “are a population with an extremely high risk to suffer a heart attack or a stroke,” said Joern Dopheide, MD, during a press conference at the meeting. Despite the known benefits of statins, including the reduction of all-cause and cardiovascular death and the reduction of morbidity, adherence to guideline-directed statin therapy is far from optimal, said Dr. Dopheide of Bern (Switzerland) University Hospital.

Patients with peripheral artery disease (PAD) not taking statins had a mortality rate of 34%, more than three times that of patients adherent to an intensified statin regimen. More surprisingly, patients who had been on a statin and then stopped the medication also had a mortality rate of 33%, indistinguishable from those who had never been treated with a statin.

Although statin adherence is low in general, it’s especially low in patients with PAD, said Dr. Dopheide. Still, he said, “few systematic data exist on the prognostic value of statin adherence and the correlation between adherence and cardiovascular outcome in PAD patients.”

Accordingly, Dr. Dopheide and his coinvestigators sought to determine the association between statin adherence and survival in PAD patients. The researchers obtained baseline and follow-up data for a cohort of 691 symptomatic PAD patients seen at a single site, looking at statin dosage, LDL cholesterol levels, and survival.

The patients were followed for a period of 50 months. Dr. Dopheide said that “Over the time course, we were able to increase the statin adherence from about 73% to about 81%, and parallel to that, we were able to reduce the LDL cholesterol levels from about 97 to 83 mg/dL, and we were able to increase the intensity of patients on statin therapy.”

Dr. Dopheide said that he and his colleagues saw a dose-response effect, so that the biggest drop in cholesterol was seen in patients on high statin doses, on more potent statins, or both.

Intensity was increased in some cases by upping statin dose – the mean statin dose climbed from 50 to 58 mg daily during the study period. An alternative strategy was to switch to a more potent statin such as atorvastatin or rosuvastatin; sometimes both intensity and dose were boosted.

“We were able to see that patients who were always on their statin therapy had a pretty low mortality rate of about 20%,” a figure that was halved for patients on more intensive statin therapy, who had a mortality rate of 10% across the study period, said Dr. Dopheide. “Patients in whom we started a statin therapy still profited from it, and had only a 15% mortality,” he added.

Some of the most surprising – and disturbing – study findings involved those who reduced their statin dose: “When patients discontinued their usual dose and decreased it, they suffered an even higher mortality rate, of nearly 43%. So that was kind of surprising and shocking to us.”

Identifying these high-risk patients and keeping them adherent is a substantial clinical challenge, but an important goal, said Dr. Dopheide. “We know that patients with peripheral arterial disease are a little more underrepresented in daily practice; it’s hard to identify them, especially when they are asymptomatic,” he acknowledged. However, once a PAD patient is identified, “One should at least keep the patient on the statin dosage they have,” or initiate statins if needed.

Further, warned Dr. Dopheide, “One should never discontinue statin or decrease the dosage,” adding that PAD patients should be informed that they are at “very high risk for myocardial infarction or stroke.” These patients “should regard their statin therapy as one of the most important and life-saving medications they can take,” he said.

Dr. Dopheide reported no outside sources of funding and no conflicts of interest.

koakes@mdedge.com

SOURCE: Dopheide, J., et al. ESC Congress 2019, Abstract P5363.

Major depressive disorder (MDD) is a significant pediatric health problem, with a lifetime prevalence as high as 20% by the end of adolescence.^1-3 Major depressive disorder in adolescence is associated with significant morbidity, including poor social functioning, school difficulties, early pregnancy, and increased risk of physical illness and substance abuse.^4-6 It is also linked with significant mortality, with increased risk for suicide, which is now the second leading cause of death in individuals age 10 to 24 years.^1,7,8

As their name suggests, antidepressants comprise a group of medications that are used to treat MDD; they are also, however, first-line agents for generalized anxiety disorder (GAD), posttraumatic stress disorder (PTSD), and obsessive-compulsive disorder (OCD) in adults. Anxiety disorders (including GAD and other anxiety diagnoses) and PTSD are also common in childhood and adolescence with a combined lifetime prevalence ranging from 15% to 30%.^9,10 These disorders are also associated with increased risk of suicide.¹¹ For all of these disorders, depending on the severity of presentation and the preference of the patient, treatments are often a combination of psychotherapy and psychopharmacology.

Clinicians face several challenges when considering antidepressants for pediatric patients. Pediatricians and psychiatrists need to understand whether these medications work in children and adolescents, and whether there are unique developmental safety and tolerability issues. The evidence base in child psychiatry is considerably smaller compared with that of adult psychiatry. From this more limited evidence base also came the controversial “black-box” warning regarding a risk of emergent suicidality when starting antidepressants that accompanies all antidepressants for pediatric, but not adult, patients. This warning has had major effects on clinical encounters with children experiencing depression, including altering clinician prescribing behavior.¹²

In this article, we review the current evidence for antidepressant efficacy, tolerability, and safety in pediatric patients. We also suggest ways in which clinicians might choose, start, and stop antidepressants in children, as well as how to talk with parents about benefits, risks, and the black-box warning.

Do antidepressants work in children?

Selective serotonin reuptake inhibitors. Selective serotonin reuptake inhibitors (SSRIs) are the most commonly used class of antidepressants in both children and adults.¹³ While only a few SSRIs are FDA-approved for pediatric indications, the lack of FDA approval is typically related to a lack of sufficient testing in randomized controlled trials (RCTs) for specific pediatric indications, rather than to demonstrable differences in efficacy between antidepressant agents. Since there is currently no data to suggest inferiority of one agent compared to another in children or adults,^14,15 efficacy data will be discussed here as applied to the class of SSRIs, generalizing from RCTs conducted on individual drugs. Table 1 lists FDA indications and dosing information for individual antidepressants.

There is strong evidence that SSRIs are effective for treating pediatric anxiety disorders (eg, social anxiety disorder and GAD)¹⁶ and OCD,¹⁷ with numbers needed to treat (NNT) between 3 and 5. For both of these disorders, SSRIs combined with cognitive-behavioral therapy (CBT) have the highest likelihood of improving symptoms or achieving remission.^17,18

Selective serotonin reuptake inhibitors are also effective for treating pediatric MDD; however, the literature is more complex for this disorder compared to GAD and OCD as there are considerable differences in effect sizes between National Institute of Mental Health (NIMH)–funded studies and industry-sponsored trials.¹³ The major NIMH-sponsored adolescent depression trial, TADS (Treatment for Adolescents and Depression Study), showed that SSRIs (fluoxetine in this case) were quite effective, with an NNT of 4 over the acute phase (12 weeks).¹⁹ Ultimately, approximately 80% of adolescents improved over 9 months. Many industry-sponsored trials for MDD in pediatric patients had large placebo response rates (approximately 60%), which resulted in smaller between-group differences, and estimates of an NNT closer to 12,¹³ which has muddied the waters in meta-analyses that include all trials.²⁰ Improvement in depressive symptoms also appears to be bolstered by concomitant CBT in MDD,¹⁹ but not as robustly as in GAD and OCD. While the full benefit of SSRIs for depression may take as long as 8 weeks, a meta-analysis of depression studies of pediatric patients suggests that significant benefits from placebo are observed as early as 2 weeks, and that further treatment gains are minimal after 4 weeks.¹⁵ Thus, we recommend at least a 4- to 6-week trial at therapeutic dosing before deeming a medication a treatment failure.

Continue to: Posttraumatic stress disorder...

Posttraumatic stress disorder is a fourth disorder in which SSRIs are a first-line treatment in adults. The data for using SSRIs to treat pediatric patients with PTSD is scant, with only a few RCTs, and no large NIMH-funded trials. Randomized controlled trials have not demonstrated significant differences between SSRIs and placebo^21,22 and thus the current first-line recommendation in pediatric PTSD remains trauma-focused therapy, with good evidence for trauma-focused CBT.²³ Practically speaking, there can be considerable overlap of PTSD, depression, and anxiety symptoms in children,²³ and children with a history of trauma who also have comorbid MDD may benefit from medication if their symptoms persist despite an adequate trial of psychotherapy.

Taken together, the current evidence suggests that SSRIs are often effective in pediatric GAD, OCD, and MDD, with low NNTs (ranging from 3 to 5 based on NIMH-funded trials) for all of these disorders; there is not yet sufficient evidence of efficacy in pediatric patients with PTSD.

Fluoxetine has been studied more intensively than other SSRIs (for example, it was the antidepressant used in the TADS trial), and thus has the largest evidence base. For this reason, fluoxetine is often considered the first of the first-line options. Additionally, fluoxetine has a longer half-life than other antidepressants, which may make it more effective in situations where patients are likely to miss doses, and results in a lower risk of withdrawal symptoms when stopped due to “self-tapering.”

SNRIs and atypical antidepressants. Other antidepressants commonly used in pediatric patients but with far less evidence of efficacy include serotonin-norepinephrine reuptake inhibitors (SNRIs) and the atypical antidepressants bupropion and mirtazapine. The SNRI duloxetine is FDA-approved for treating GAD in children age 7 to 17, but there are no other pediatric indications for duloxetine, or for the other SNRIs.

In general, adverse effect profiles are worse for SNRIs compared to SSRIs, further limiting their utility. While there are no pediatric studies demonstrating SNRI efficacy for neuropathic pain, good data exists in adults.²⁴ Thus, an SNRI could be a reasonable option if a pediatric patient has failed prior adequate SSRI trials and also has comorbid neuropathic pain.

Continue to: Neither bupropion nor mirtazapine...

Neither bupropion nor mirtazapine have undergone rigorous testing in pediatric patients, and therefore these agents should generally be considered only once other first-line treatments have failed. Bupropion has been evaluated for attention-deficit/hyperactivity disorder (ADHD)²⁵ and for adolescent smoking cessation.²⁶ However, the evidence is weak, and bupropion is not considered a first-line option for children and adolescents.

Tricyclic antidepressants. Randomized controlled trials have demonstrated that tricyclic antidepressants (TCAs) are efficacious for treating several pediatric conditions; however, their significant side effect profile, their monitoring requirements, as well as their lethality in overdose has left them replaced by SSRIs in most cases. That said, they can be appropriate in refractory ADHD (desipramine^27,28) and refractory OCD (clomipramine is FDA-approved for this indication²⁹); they are considered a third-line treatment for enuresis.³⁰

Why did my patient stop the medication?

Common adverse effects. Although the greatest benefit of antidepressant medications compared with placebo is achieved relatively early on in treatment, it generally takes time for these benefits to accrue and become clinically apparent.^15,31 By contrast, most adverse effects of antidepressants present and are at their most severe early in treatment. The combination of early adverse effects and delayed efficacy leads many patients, families, and clinicians to discontinue medications before they have an adequate chance to work. Thus, it is imperative to provide psychoeducation before starting a medication about the typical time-course of improvement and adverse effects (Table 2).

Adverse effects of SSRIs often appear or worsen transiently during initiation of a medication, during a dose increase,³² or, theoretically, with the addition of a medication that interferes with SSRI metabolism (eg, cimetidine inhibition of cytochrome P450 2D6).³³ If families are prepared for this phenomenon and the therapeutic alliance is adequate, adverse effects can be tolerated to allow for a full medication trial. Common adverse effects of SSRIs include sleep problems (insomnia/sedation), gastrointestinal upset, sexual dysfunction, dry mouth, and hyperhidrosis. Although SSRIs differ somewhat in the frequency of these effects, as a class, they are more similar than different. Adequate psychoeducation is especially imperative in the treatment of OCD and anxiety disorders, where there is limited evidence of efficacy for any non-serotonergic antidepressants.

Serotonin-norepinephrine reuptake inhibitors are not considered first-line medications because of the reduced evidence base compared to SSRIs and their enhanced adverse effect profiles. Because SNRIs partially share a mechanism of action with SSRIs, they also share portions of the adverse effects profile. However, SNRIs have the additional adverse effect of hypertension, which is related to their noradrenergic activity. Thus, it is reasonable to obtain a baseline blood pressure before initiating an SNRI, as well as periodically after initiation and during dose increases, particularly if the patient has other risk factors for hypertension.³⁴

Continue to: Although TCAs have efficacy...

Although TCAs have efficacy in some pediatric disorders,^27-29,35 their adverse effect profile limits their use. Tricyclic antidepressants are highly anticholinergic (causing dizziness secondary to orthostatic hypotension, dry mouth, and urinary retention) and antihistaminergic (causing sedation and weight gain). Additionally, TCAs lower the seizure threshold and have adverse cardiac effects relating to their anti-alpha-1 adrenergic activity, resulting in dose-dependent increases in the QTc and cardiac toxicity in overdose that could lead to arrhythmia and death. These medications have their place, but their use requires careful informed consent, clear treatment goals, and baseline and periodic cardiac monitoring (via electrocardiogram).

Serious adverse effects. Clinicians may be hesitant to prescribe antidepressants for pediatric patients because of the potential for more serious adverse effects, including severe behavioral activation syndromes, serotonin syndrome, and emergent suicidality. However, current FDA-approved antidepressants arguably have one of the most positive risk/benefit profiles of any orally-administered medication approved for pediatric patients. Having a strong understanding of the evidence is critical to evaluating when it is appropriate to prescribe an antidepressant, how to properly monitor the patient, and how to obtain accurate informed consent.

Pediatric behavioral activation syndrome. Many clinicians report that children receiving antidepressants experience a pediatric behavioral activation syndrome, which exists along a spectrum from mild activation, increased energy, insomnia, or irritability up through more severe presentations of agitation, hyperactivity, or possibly mania. A recent meta-analysis suggested a positive association between antidepressant use and activation events on the milder end of this spectrum in pediatric patients with non-OCD anxiety disorders,¹⁶ and it is thought that compared with adolescents, younger children are more susceptible to activation adverse effects.³⁶ The likelihood of activation events has been associated with higher antidepressant plasma levels,³⁷ suggesting that dose or individual differences in metabolism may play a role. At the severe end of the spectrum, the risk of induction of mania in pediatric patients with depression or anxiety is relatively rare (<2%) and not statistically different from placebo in RCTs of pediatric participants.³⁸ Meta-analyses of larger randomized, placebo-controlled trials of adults do not support the idea that SSRIs and other second-generation antidepressants carry an increased risk of mania compared with placebo.^39,40 Children or adolescents with bona fide bipolar disorder (ie, patients who have had observed mania that meets all DSM-5 criteria) should be treated with a mood-stabilizing agent or antipsychotic if prescribed an antidepressant.⁴¹ These clear-cut cases are, however, relatively rare, and more often clinicians are confronted with ambiguous cases that include a family history of bipolar disorder along with “softer” symptoms of irritability, intrusiveness, or aggression. In these children, SSRIs may be appropriate for depressive, OCD, or anxiety symptoms, and should be strongly considered before prescribing antipsychotics or mood stabilizers, as long as initiated with proper monitoring.

Serotonin syndrome is a life-threatening condition caused by excess synaptic serotonin. It is characterized by confusion, sweating, diarrhea, hypertension, hyperthermia, and tachycardia. At its most severe, serotonin syndrome can result in seizures, arrhythmias, and death. The risk of serotonin syndrome is very low when using an SSRI as monotherapy. Risk increases with polypharmacy, particularly unexamined polypharmacy when multiple serotonergic agents are inadvertently on board. Commonly used serotonergic agents include other antidepressants, migraine medications (eg, triptans), some pain medications, and the cough suppressant dextromethorphan.

The easiest way to mitigate the risk of serotonin syndrome is to use an interaction index computer program, which can help ensure that the interacting agents are not prescribed without first discussing the risks and benefits. It is important to teach adolescents that certain recreational drugs are highly serotonergic and can cause serious interactions with antidepressants. For example, recreational use of dextrometh­orphan or 3,4-methylenedioxymethamphetamine (MDMA; commonly known as “ecstasy”) has been associated with serotonin syndrome in adolescents taking antidepressant medications.^42,43

Continue to: Suicidality

Suicidality. The black-box warning regarding a risk of emergent suicidality when starting antidepressant treatment in children is controversial.⁴⁴ The prospect that a medication intended to ameliorate depression might instead risk increasing suicidal thinking is alarming to parents and clinicians alike. To appropriately weigh and discuss the risks and benefits with families, it is important to understand the data upon which the warning is based.

In 2004, the FDA commissioned a review of 23 antidepressant trials, both published and unpublished, pooling studies across multiple indications (MDD, OCD, anxiety, and ADHD) and multiple antidepressant classes. This meta-analysis, which included nearly 4,400 pediatric patients, found a small but statistically significant increase in spontaneously-reported suicidal thoughts or actions, with a risk difference of 1% (95% confidence interval [CI], 1% to 2%).⁴⁵ These data suggest that if one treats 100 pediatric patients, 1 to 2 of them may experience short-term increases in suicidal thinking or behavior.⁴⁵ There were no differences in suicidal thinking when assessed systematically (ie, when all subjects reported symptoms of suicidal ideation on structured rating scales), and there were no completed suicides.⁴⁵ A subsequent analysis that included 27 pediatric trials suggested an even lower, although still significant, risk difference (<1%), yielding a number needed to harm (NNH) of 143.⁴⁶ Thus, with low NNT for efficacy (3 to 6) and relatively high NNH for emergent suicidal thoughts or behaviors (100 to 143), for many patients the benefits will outweigh the risks.

Figure 1, Figure 2, and Figure 3 are Cates plots that depict the absolute benefits of antidepressants compared with the risk of suicidality for pediatric patients with MDD, OCD, and anxiety disorders. Recent meta-analyses have suggested that the increased risk of suicidality in antidepressant trials is specific to studies that included children and adolescents, and is not observed in adult studies. A meta-analysis of 70 trials involving 18,526 participants suggested that the odds ratio of suicidality in trials of children and adolescents was 2.39 (95% CI, 1.31 to 4.33) compared with 0.81 (95% CI, 0.51 to 1.28) in adults.⁴⁷ Additionally, a network meta-analysis exclusively focusing on pediatric antidepressant trials in MDD reported significantly higher suicidality-related adverse events in venlafaxine trials compared with placebo, duloxetine, and several SSRIs (fluoxetine, paroxetine, and escitalopram).²⁰ These data should be interpreted with caution as differences in suicidality detected between agents is quite possibly related to differences in the method of assessment between trials, as opposed to actual differences in risk between agents.

Epidemiologic data further support the use of antidepressants in pediatric patients, showing that antidepressant use is associated with decreased teen suicide attempts and completions,⁴⁸ and the decline in prescriptions that occurred following the black-box warning was accompanied by a 14% increase in teen suicides.⁴⁹ Multiple hypotheses have been proposed to explain the pediatric clinical trial findings. One idea is that potential adverse effects of activation, or the intended effects of restoring the motivation, energy, and social engagement that is often impaired in depression, increases the likelihood of thinking about suicide or acting on thoughts. Another theory is that reporting of suicidality may be increased, rather than increased de novo suicidality itself. Antidepressants are effective for treating pediatric anxiety disorders, including social anxiety disorder,¹⁶ which could result in more willingness to report. Also, the manner in which adverse effects are generally ascertained in trials might have led to increased spontaneous reporting. In many trials, investigators ask whether participants have any adverse effects in general, and inquire about specific adverse effects only if the family answers affirmatively. Thus, the increased rate of other adverse effects associated with antidepressants (sleep problems, gastrointestinal upset, dry mouth, etc.) might trigger a specific question regarding suicidal ideation, which the child or family then may be more likely to report. Alternatively, any type of psychiatric treatment could increase an individual’s propensity to report; in adolescent psychotherapy trials, non-medicated participants have reported emergent suicidality at similar frequencies as those described in drug trials.⁵⁰ Regardless of the mechanism, the possibility of treatment-emergent suicidality is a low-frequency but serious event that necessitates careful monitoring when starting medication. Current guidelines suggest seeing children weekly for the first month after medication initiation, every 2 weeks for the following month, and monthly thereafter.⁵¹

Continue to: How long should the antidepressant be continued?

How long should the antidepressant be continued?

Many patients are concerned about how long they may be taking medication, and whether they will be taking an antidepressant “forever.” A treatment course can be broken into an acute phase, wherein remission is achieved and maintained for 6 to 8 weeks. This is followed by a continuation phase, with the goal of relapse prevention, lasting 16 to 20 weeks. The length of the last phase—the maintenance phase—depends both on the child’s history, the underlying therapeutic indication, the adverse effect burden experienced, and the family’s preferences/values. In general, for a first depressive episode, after treating for 1 year, a trial of discontinuation can be attempted with close monitoring. For a second depressive episode, we recommend 2 years of remission on antidepressant therapy before attempting discontinuation. In patients who have had 3 depressive episodes, or have had episodes of high severity, we recommend continuing antidepressant treatment indefinitely. Although much less well studied, the risk of relapse following SSRI discontinuation appears much more significant in OCD, whereas anxiety disorders and MDD have a relatively comparable risk.⁵²

In general, stopping an antidepressant should be done carefully and slowly. The speed with which a specific antidepressant can be stopped is largely related to its half-life. Agents with very long half-lives, such as fluoxetine (half-life of 5 days for the parent compound and 9 days for active metabolite), can often be stopped altogether, being “auto-tapered” by the long half-life. One might still consider a taper if the patient were taking high doses. Medications with shorter half-lives must be more carefully tapered to avoid discontinuation syndromes. Discontinuation syndromes are characterized by flu-like symptoms (nausea, myalgias, fatigue, dizziness) and worsening mood. Medications with short half-lives (eg, paroxetine and venlafaxine) have the highest potential for this syndrome in children,⁵³ and thus are used less frequently.

What to do when first-line treatments fail

When a child does not experience sufficient improvement from first-line treatments, it is crucial to determine whether they have experienced an adequate dosing, duration, and quality of medication and psychotherapy.

Adequate psychotherapy? To determine whether children are receiving adequate CBT, ask:

1. if the child receives homework from psychotherapy
2. if the parents are included in treatment
3. if therapy has involved identifying thought patterns that may be contributing to the child’s illness, and
4. if the therapist has ever exposed the child to a challenge likely to produce anxiety or distress in a supervised environment and has developed an exposure hierarchy (for conditions with primarily exposure-based therapies, such as OCD or anxiety disorders).

If a family is not receiving most of these elements in psychotherapy, this is a good indicator that they may not be receiving evidence-based CBT.

Continue to: Adequate pharmacotherapy?

Adequate pharmacotherapy? Similarly, when determining the adequacy of previous pharmacotherapy, it is critical to determine whether the child received an adequate dose of medications (at least the FDA-recommended minimum dose) for an adequate duration of time at therapeutic dosing (at least 6 weeks for MDD, 8 weeks for anxiety disorders, and 8 to 12 weeks for pediatric patients with OCD), and that the child actually took the medication regularly during that period. Patient compliance can typically be tracked through checking refill requests or intervals through the patient’s pharmacy. Ensuring proper delivery of first-line treatments is imperative because (1) the adverse effects associated with second-line treatments are often more substantial; (2) the cost in terms of time and money is considerably higher with second-line treatments, and; (3) the evidence regarding the benefits of these treatments is much less certain.

Inadequate dosing is a common reason for non-response in pediatric patients. Therapeutic dose ranges for common antidepressants are displayed in Table 1. Many clinicians underdose antidepressants for pediatric patients initially (and often throughout treatment) because they fear that the typical dose titration used in clinical trials will increase the risk of adverse effects compared with more conservative dosing. There is limited evidence to suggest that this underdosing strategy is likely to be successful; adverse effects attributable to these medications are modest, and most that are experienced early in treatment (eg, headache, increased anxiety or irritability, sleep problems, gastrointestinal upset) are self-limiting and may be coincidental rather than medication-induced. Furthermore, there is no evidence for efficacy of subtherapeutic dosing in children in the acute phase of treatment or for preventing relapse.¹⁴ Thus, from an efficacy standpoint, a medication trial has not officially begun until the therapeutic dose range is reached.

Once dosing is within the therapeutic range, however, pediatric data differs from the adult literature. In most adult psychi­atric conditions, higher doses of SSRIs within the therapeutic range are associated with an increased response rate.^14,54 In pediatrics, there are few fixed dose trials, and once within the recommended therapeutic range, minimal data supports an association between higher dosing and higher efficacy.¹⁴ In general, pediatric guidelines are silent regarding optimal dosing of SSRIs within the recommended dose range, and higher antidepressant doses often result in a more significant adverse effect burden for children. One exception is pediatric OCD, where, similar to adults, the guidelines suggest that higher dosing of SSRIs often is required to induce a therapeutic response as compared to MDD and GAD.^31,55

If a child does not respond to adequate first-line treatment (or has a treatment history that cannot be fully verified), repeating these first-line interventions carries little risk and can be quite effective. For example, 60% of adolescents with MDD who did not initially respond to an SSRI demonstrated a significant response when prescribed a second SSRI or venlafaxine (with or without CBT).⁵⁶

When pediatric patients continue to experience significantly distressing and/or debilitating symptoms (particularly in MDD) despite multiple trials of antidepressants and psychotherapy, practitioners should consider a careful referral to interventional psychiatry services, which can include the more intensive treatments of electroconvulsive therapy, repetitive transcranial magnetic stimulation, or ketamine (see Box 1). Given the substantial morbidity and mortality associated with adolescent depression, interventional psychiatry treatments are under-researched and under-utilized clinically in pediatric populations.

Continue to: Antidepressants in general...

Antidepressants in general, and SSRIs in particular, are the first-line pharmacotherapy for pediatric anxiety, OCD, and MDD. For PTSD, although they are a first-line treatment in adults, their efficacy has not been demonstrated in children and adolescents. Antidepressants are generally safe, well-tolerated, and effective, with low NNTs (3 to 5 for anxiety and OCD; 4 to 12 in MDD, depending on whether industry trials are included). It is important that clinicians and families be educated about possible adverse effects and their time course in order to anticipate difficulties, ensure adequate informed consent, and monitor appropriately. The black-box warning regarding treatment-emergent suicidal thoughts or behaviors must be discussed (for suggested talking points, see Box 2). The NNH is large (100 to 143), and for many patients, the benefits will outweigh the risks. For pediatric patients who fail to respond to multiple adequate trials of antidepressants and psychotherapy, referrals for interventional psychiatry consultation should be considered.

Bottom Line

Although the evidence base for prescribing antidepressants for children and adolescents is smaller compared to the adult literature, properly understanding and prescribing these agents, and explaining their risks and benefits to families, can make a major difference in patient compliance, satisfaction, and outcomes. Antidepressants (particularly selective serotonin reuptake inhibitors) are the firstline pharmacologic intervention for pediatric patients with anxiety disorders, obsessive-compulsive disorder, or major depressive disorder.

Related Resource

• Bonin L, Moreland CS. Overview of prevention and treatment for pediatric depression. https://www.uptodate.com/contents/overview-of-prevention-and-treatment-for-pediatric-depression. Last reviewed July 2019.

Drug Brand Names

Bupropion • Wellbutrin, Zyban
Cimetidine • Tagamet
Citalopram • Celexa
Clomipramine • Anafranil
Desipramine • Norpramin
Desvenlafaxine • Pristiq
Duloxetine • Cymbalta
Escitalopram • Lexapro
Fluoxetine • Prozac
Fluvoxamine • Luvox
Imipramine • Tofranil
Mirtazapine • Remeron
Nortriptyline • Pamelor
Paroxetine • Paxil
Sertraline • Zoloft
Venlafaxine • Effexor
Vilazodone • Viibryd
Vortioxetine • Trintellix

Box 1

Box 2

Major depressive disorder (MDD) is a significant pediatric health problem, with a lifetime prevalence as high as 20% by the end of adolescence.^1-3 Major depressive disorder in adolescence is associated with significant morbidity, including poor social functioning, school difficulties, early pregnancy, and increased risk of physical illness and substance abuse.^4-6 It is also linked with significant mortality, with increased risk for suicide, which is now the second leading cause of death in individuals age 10 to 24 years.^1,7,8

As their name suggests, antidepressants comprise a group of medications that are used to treat MDD; they are also, however, first-line agents for generalized anxiety disorder (GAD), posttraumatic stress disorder (PTSD), and obsessive-compulsive disorder (OCD) in adults. Anxiety disorders (including GAD and other anxiety diagnoses) and PTSD are also common in childhood and adolescence with a combined lifetime prevalence ranging from 15% to 30%.^9,10 These disorders are also associated with increased risk of suicide.¹¹ For all of these disorders, depending on the severity of presentation and the preference of the patient, treatments are often a combination of psychotherapy and psychopharmacology.

Clinicians face several challenges when considering antidepressants for pediatric patients. Pediatricians and psychiatrists need to understand whether these medications work in children and adolescents, and whether there are unique developmental safety and tolerability issues. The evidence base in child psychiatry is considerably smaller compared with that of adult psychiatry. From this more limited evidence base also came the controversial “black-box” warning regarding a risk of emergent suicidality when starting antidepressants that accompanies all antidepressants for pediatric, but not adult, patients. This warning has had major effects on clinical encounters with children experiencing depression, including altering clinician prescribing behavior.¹²

In this article, we review the current evidence for antidepressant efficacy, tolerability, and safety in pediatric patients. We also suggest ways in which clinicians might choose, start, and stop antidepressants in children, as well as how to talk with parents about benefits, risks, and the black-box warning.

Do antidepressants work in children?

Selective serotonin reuptake inhibitors. Selective serotonin reuptake inhibitors (SSRIs) are the most commonly used class of antidepressants in both children and adults.¹³ While only a few SSRIs are FDA-approved for pediatric indications, the lack of FDA approval is typically related to a lack of sufficient testing in randomized controlled trials (RCTs) for specific pediatric indications, rather than to demonstrable differences in efficacy between antidepressant agents. Since there is currently no data to suggest inferiority of one agent compared to another in children or adults,^14,15 efficacy data will be discussed here as applied to the class of SSRIs, generalizing from RCTs conducted on individual drugs. Table 1 lists FDA indications and dosing information for individual antidepressants.

There is strong evidence that SSRIs are effective for treating pediatric anxiety disorders (eg, social anxiety disorder and GAD)¹⁶ and OCD,¹⁷ with numbers needed to treat (NNT) between 3 and 5. For both of these disorders, SSRIs combined with cognitive-behavioral therapy (CBT) have the highest likelihood of improving symptoms or achieving remission.^17,18

Selective serotonin reuptake inhibitors are also effective for treating pediatric MDD; however, the literature is more complex for this disorder compared to GAD and OCD as there are considerable differences in effect sizes between National Institute of Mental Health (NIMH)–funded studies and industry-sponsored trials.¹³ The major NIMH-sponsored adolescent depression trial, TADS (Treatment for Adolescents and Depression Study), showed that SSRIs (fluoxetine in this case) were quite effective, with an NNT of 4 over the acute phase (12 weeks).¹⁹ Ultimately, approximately 80% of adolescents improved over 9 months. Many industry-sponsored trials for MDD in pediatric patients had large placebo response rates (approximately 60%), which resulted in smaller between-group differences, and estimates of an NNT closer to 12,¹³ which has muddied the waters in meta-analyses that include all trials.²⁰ Improvement in depressive symptoms also appears to be bolstered by concomitant CBT in MDD,¹⁹ but not as robustly as in GAD and OCD. While the full benefit of SSRIs for depression may take as long as 8 weeks, a meta-analysis of depression studies of pediatric patients suggests that significant benefits from placebo are observed as early as 2 weeks, and that further treatment gains are minimal after 4 weeks.¹⁵ Thus, we recommend at least a 4- to 6-week trial at therapeutic dosing before deeming a medication a treatment failure.

Continue to: Posttraumatic stress disorder...

Posttraumatic stress disorder is a fourth disorder in which SSRIs are a first-line treatment in adults. The data for using SSRIs to treat pediatric patients with PTSD is scant, with only a few RCTs, and no large NIMH-funded trials. Randomized controlled trials have not demonstrated significant differences between SSRIs and placebo^21,22 and thus the current first-line recommendation in pediatric PTSD remains trauma-focused therapy, with good evidence for trauma-focused CBT.²³ Practically speaking, there can be considerable overlap of PTSD, depression, and anxiety symptoms in children,²³ and children with a history of trauma who also have comorbid MDD may benefit from medication if their symptoms persist despite an adequate trial of psychotherapy.

Taken together, the current evidence suggests that SSRIs are often effective in pediatric GAD, OCD, and MDD, with low NNTs (ranging from 3 to 5 based on NIMH-funded trials) for all of these disorders; there is not yet sufficient evidence of efficacy in pediatric patients with PTSD.

Fluoxetine has been studied more intensively than other SSRIs (for example, it was the antidepressant used in the TADS trial), and thus has the largest evidence base. For this reason, fluoxetine is often considered the first of the first-line options. Additionally, fluoxetine has a longer half-life than other antidepressants, which may make it more effective in situations where patients are likely to miss doses, and results in a lower risk of withdrawal symptoms when stopped due to “self-tapering.”

SNRIs and atypical antidepressants. Other antidepressants commonly used in pediatric patients but with far less evidence of efficacy include serotonin-norepinephrine reuptake inhibitors (SNRIs) and the atypical antidepressants bupropion and mirtazapine. The SNRI duloxetine is FDA-approved for treating GAD in children age 7 to 17, but there are no other pediatric indications for duloxetine, or for the other SNRIs.

In general, adverse effect profiles are worse for SNRIs compared to SSRIs, further limiting their utility. While there are no pediatric studies demonstrating SNRI efficacy for neuropathic pain, good data exists in adults.²⁴ Thus, an SNRI could be a reasonable option if a pediatric patient has failed prior adequate SSRI trials and also has comorbid neuropathic pain.

Continue to: Neither bupropion nor mirtazapine...

Neither bupropion nor mirtazapine have undergone rigorous testing in pediatric patients, and therefore these agents should generally be considered only once other first-line treatments have failed. Bupropion has been evaluated for attention-deficit/hyperactivity disorder (ADHD)²⁵ and for adolescent smoking cessation.²⁶ However, the evidence is weak, and bupropion is not considered a first-line option for children and adolescents.

Tricyclic antidepressants. Randomized controlled trials have demonstrated that tricyclic antidepressants (TCAs) are efficacious for treating several pediatric conditions; however, their significant side effect profile, their monitoring requirements, as well as their lethality in overdose has left them replaced by SSRIs in most cases. That said, they can be appropriate in refractory ADHD (desipramine^27,28) and refractory OCD (clomipramine is FDA-approved for this indication²⁹); they are considered a third-line treatment for enuresis.³⁰

Why did my patient stop the medication?

Common adverse effects. Although the greatest benefit of antidepressant medications compared with placebo is achieved relatively early on in treatment, it generally takes time for these benefits to accrue and become clinically apparent.^15,31 By contrast, most adverse effects of antidepressants present and are at their most severe early in treatment. The combination of early adverse effects and delayed efficacy leads many patients, families, and clinicians to discontinue medications before they have an adequate chance to work. Thus, it is imperative to provide psychoeducation before starting a medication about the typical time-course of improvement and adverse effects (Table 2).

Adverse effects of SSRIs often appear or worsen transiently during initiation of a medication, during a dose increase,³² or, theoretically, with the addition of a medication that interferes with SSRI metabolism (eg, cimetidine inhibition of cytochrome P450 2D6).³³ If families are prepared for this phenomenon and the therapeutic alliance is adequate, adverse effects can be tolerated to allow for a full medication trial. Common adverse effects of SSRIs include sleep problems (insomnia/sedation), gastrointestinal upset, sexual dysfunction, dry mouth, and hyperhidrosis. Although SSRIs differ somewhat in the frequency of these effects, as a class, they are more similar than different. Adequate psychoeducation is especially imperative in the treatment of OCD and anxiety disorders, where there is limited evidence of efficacy for any non-serotonergic antidepressants.

Serotonin-norepinephrine reuptake inhibitors are not considered first-line medications because of the reduced evidence base compared to SSRIs and their enhanced adverse effect profiles. Because SNRIs partially share a mechanism of action with SSRIs, they also share portions of the adverse effects profile. However, SNRIs have the additional adverse effect of hypertension, which is related to their noradrenergic activity. Thus, it is reasonable to obtain a baseline blood pressure before initiating an SNRI, as well as periodically after initiation and during dose increases, particularly if the patient has other risk factors for hypertension.³⁴

Continue to: Although TCAs have efficacy...

Although TCAs have efficacy in some pediatric disorders,^27-29,35 their adverse effect profile limits their use. Tricyclic antidepressants are highly anticholinergic (causing dizziness secondary to orthostatic hypotension, dry mouth, and urinary retention) and antihistaminergic (causing sedation and weight gain). Additionally, TCAs lower the seizure threshold and have adverse cardiac effects relating to their anti-alpha-1 adrenergic activity, resulting in dose-dependent increases in the QTc and cardiac toxicity in overdose that could lead to arrhythmia and death. These medications have their place, but their use requires careful informed consent, clear treatment goals, and baseline and periodic cardiac monitoring (via electrocardiogram).

Serious adverse effects. Clinicians may be hesitant to prescribe antidepressants for pediatric patients because of the potential for more serious adverse effects, including severe behavioral activation syndromes, serotonin syndrome, and emergent suicidality. However, current FDA-approved antidepressants arguably have one of the most positive risk/benefit profiles of any orally-administered medication approved for pediatric patients. Having a strong understanding of the evidence is critical to evaluating when it is appropriate to prescribe an antidepressant, how to properly monitor the patient, and how to obtain accurate informed consent.

Pediatric behavioral activation syndrome. Many clinicians report that children receiving antidepressants experience a pediatric behavioral activation syndrome, which exists along a spectrum from mild activation, increased energy, insomnia, or irritability up through more severe presentations of agitation, hyperactivity, or possibly mania. A recent meta-analysis suggested a positive association between antidepressant use and activation events on the milder end of this spectrum in pediatric patients with non-OCD anxiety disorders,¹⁶ and it is thought that compared with adolescents, younger children are more susceptible to activation adverse effects.³⁶ The likelihood of activation events has been associated with higher antidepressant plasma levels,³⁷ suggesting that dose or individual differences in metabolism may play a role. At the severe end of the spectrum, the risk of induction of mania in pediatric patients with depression or anxiety is relatively rare (<2%) and not statistically different from placebo in RCTs of pediatric participants.³⁸ Meta-analyses of larger randomized, placebo-controlled trials of adults do not support the idea that SSRIs and other second-generation antidepressants carry an increased risk of mania compared with placebo.^39,40 Children or adolescents with bona fide bipolar disorder (ie, patients who have had observed mania that meets all DSM-5 criteria) should be treated with a mood-stabilizing agent or antipsychotic if prescribed an antidepressant.⁴¹ These clear-cut cases are, however, relatively rare, and more often clinicians are confronted with ambiguous cases that include a family history of bipolar disorder along with “softer” symptoms of irritability, intrusiveness, or aggression. In these children, SSRIs may be appropriate for depressive, OCD, or anxiety symptoms, and should be strongly considered before prescribing antipsychotics or mood stabilizers, as long as initiated with proper monitoring.

Serotonin syndrome is a life-threatening condition caused by excess synaptic serotonin. It is characterized by confusion, sweating, diarrhea, hypertension, hyperthermia, and tachycardia. At its most severe, serotonin syndrome can result in seizures, arrhythmias, and death. The risk of serotonin syndrome is very low when using an SSRI as monotherapy. Risk increases with polypharmacy, particularly unexamined polypharmacy when multiple serotonergic agents are inadvertently on board. Commonly used serotonergic agents include other antidepressants, migraine medications (eg, triptans), some pain medications, and the cough suppressant dextromethorphan.

The easiest way to mitigate the risk of serotonin syndrome is to use an interaction index computer program, which can help ensure that the interacting agents are not prescribed without first discussing the risks and benefits. It is important to teach adolescents that certain recreational drugs are highly serotonergic and can cause serious interactions with antidepressants. For example, recreational use of dextrometh­orphan or 3,4-methylenedioxymethamphetamine (MDMA; commonly known as “ecstasy”) has been associated with serotonin syndrome in adolescents taking antidepressant medications.^42,43

Continue to: Suicidality

Suicidality. The black-box warning regarding a risk of emergent suicidality when starting antidepressant treatment in children is controversial.⁴⁴ The prospect that a medication intended to ameliorate depression might instead risk increasing suicidal thinking is alarming to parents and clinicians alike. To appropriately weigh and discuss the risks and benefits with families, it is important to understand the data upon which the warning is based.

In 2004, the FDA commissioned a review of 23 antidepressant trials, both published and unpublished, pooling studies across multiple indications (MDD, OCD, anxiety, and ADHD) and multiple antidepressant classes. This meta-analysis, which included nearly 4,400 pediatric patients, found a small but statistically significant increase in spontaneously-reported suicidal thoughts or actions, with a risk difference of 1% (95% confidence interval [CI], 1% to 2%).⁴⁵ These data suggest that if one treats 100 pediatric patients, 1 to 2 of them may experience short-term increases in suicidal thinking or behavior.⁴⁵ There were no differences in suicidal thinking when assessed systematically (ie, when all subjects reported symptoms of suicidal ideation on structured rating scales), and there were no completed suicides.⁴⁵ A subsequent analysis that included 27 pediatric trials suggested an even lower, although still significant, risk difference (<1%), yielding a number needed to harm (NNH) of 143.⁴⁶ Thus, with low NNT for efficacy (3 to 6) and relatively high NNH for emergent suicidal thoughts or behaviors (100 to 143), for many patients the benefits will outweigh the risks.

Figure 1, Figure 2, and Figure 3 are Cates plots that depict the absolute benefits of antidepressants compared with the risk of suicidality for pediatric patients with MDD, OCD, and anxiety disorders. Recent meta-analyses have suggested that the increased risk of suicidality in antidepressant trials is specific to studies that included children and adolescents, and is not observed in adult studies. A meta-analysis of 70 trials involving 18,526 participants suggested that the odds ratio of suicidality in trials of children and adolescents was 2.39 (95% CI, 1.31 to 4.33) compared with 0.81 (95% CI, 0.51 to 1.28) in adults.⁴⁷ Additionally, a network meta-analysis exclusively focusing on pediatric antidepressant trials in MDD reported significantly higher suicidality-related adverse events in venlafaxine trials compared with placebo, duloxetine, and several SSRIs (fluoxetine, paroxetine, and escitalopram).²⁰ These data should be interpreted with caution as differences in suicidality detected between agents is quite possibly related to differences in the method of assessment between trials, as opposed to actual differences in risk between agents.

Epidemiologic data further support the use of antidepressants in pediatric patients, showing that antidepressant use is associated with decreased teen suicide attempts and completions,⁴⁸ and the decline in prescriptions that occurred following the black-box warning was accompanied by a 14% increase in teen suicides.⁴⁹ Multiple hypotheses have been proposed to explain the pediatric clinical trial findings. One idea is that potential adverse effects of activation, or the intended effects of restoring the motivation, energy, and social engagement that is often impaired in depression, increases the likelihood of thinking about suicide or acting on thoughts. Another theory is that reporting of suicidality may be increased, rather than increased de novo suicidality itself. Antidepressants are effective for treating pediatric anxiety disorders, including social anxiety disorder,¹⁶ which could result in more willingness to report. Also, the manner in which adverse effects are generally ascertained in trials might have led to increased spontaneous reporting. In many trials, investigators ask whether participants have any adverse effects in general, and inquire about specific adverse effects only if the family answers affirmatively. Thus, the increased rate of other adverse effects associated with antidepressants (sleep problems, gastrointestinal upset, dry mouth, etc.) might trigger a specific question regarding suicidal ideation, which the child or family then may be more likely to report. Alternatively, any type of psychiatric treatment could increase an individual’s propensity to report; in adolescent psychotherapy trials, non-medicated participants have reported emergent suicidality at similar frequencies as those described in drug trials.⁵⁰ Regardless of the mechanism, the possibility of treatment-emergent suicidality is a low-frequency but serious event that necessitates careful monitoring when starting medication. Current guidelines suggest seeing children weekly for the first month after medication initiation, every 2 weeks for the following month, and monthly thereafter.⁵¹

Continue to: How long should the antidepressant be continued?

How long should the antidepressant be continued?

Many patients are concerned about how long they may be taking medication, and whether they will be taking an antidepressant “forever.” A treatment course can be broken into an acute phase, wherein remission is achieved and maintained for 6 to 8 weeks. This is followed by a continuation phase, with the goal of relapse prevention, lasting 16 to 20 weeks. The length of the last phase—the maintenance phase—depends both on the child’s history, the underlying therapeutic indication, the adverse effect burden experienced, and the family’s preferences/values. In general, for a first depressive episode, after treating for 1 year, a trial of discontinuation can be attempted with close monitoring. For a second depressive episode, we recommend 2 years of remission on antidepressant therapy before attempting discontinuation. In patients who have had 3 depressive episodes, or have had episodes of high severity, we recommend continuing antidepressant treatment indefinitely. Although much less well studied, the risk of relapse following SSRI discontinuation appears much more significant in OCD, whereas anxiety disorders and MDD have a relatively comparable risk.⁵²

In general, stopping an antidepressant should be done carefully and slowly. The speed with which a specific antidepressant can be stopped is largely related to its half-life. Agents with very long half-lives, such as fluoxetine (half-life of 5 days for the parent compound and 9 days for active metabolite), can often be stopped altogether, being “auto-tapered” by the long half-life. One might still consider a taper if the patient were taking high doses. Medications with shorter half-lives must be more carefully tapered to avoid discontinuation syndromes. Discontinuation syndromes are characterized by flu-like symptoms (nausea, myalgias, fatigue, dizziness) and worsening mood. Medications with short half-lives (eg, paroxetine and venlafaxine) have the highest potential for this syndrome in children,⁵³ and thus are used less frequently.

What to do when first-line treatments fail

When a child does not experience sufficient improvement from first-line treatments, it is crucial to determine whether they have experienced an adequate dosing, duration, and quality of medication and psychotherapy.

Adequate psychotherapy? To determine whether children are receiving adequate CBT, ask:

1. if the child receives homework from psychotherapy
2. if the parents are included in treatment
3. if therapy has involved identifying thought patterns that may be contributing to the child’s illness, and
4. if the therapist has ever exposed the child to a challenge likely to produce anxiety or distress in a supervised environment and has developed an exposure hierarchy (for conditions with primarily exposure-based therapies, such as OCD or anxiety disorders).

If a family is not receiving most of these elements in psychotherapy, this is a good indicator that they may not be receiving evidence-based CBT.

Continue to: Adequate pharmacotherapy?

Adequate pharmacotherapy? Similarly, when determining the adequacy of previous pharmacotherapy, it is critical to determine whether the child received an adequate dose of medications (at least the FDA-recommended minimum dose) for an adequate duration of time at therapeutic dosing (at least 6 weeks for MDD, 8 weeks for anxiety disorders, and 8 to 12 weeks for pediatric patients with OCD), and that the child actually took the medication regularly during that period. Patient compliance can typically be tracked through checking refill requests or intervals through the patient’s pharmacy. Ensuring proper delivery of first-line treatments is imperative because (1) the adverse effects associated with second-line treatments are often more substantial; (2) the cost in terms of time and money is considerably higher with second-line treatments, and; (3) the evidence regarding the benefits of these treatments is much less certain.

Inadequate dosing is a common reason for non-response in pediatric patients. Therapeutic dose ranges for common antidepressants are displayed in Table 1. Many clinicians underdose antidepressants for pediatric patients initially (and often throughout treatment) because they fear that the typical dose titration used in clinical trials will increase the risk of adverse effects compared with more conservative dosing. There is limited evidence to suggest that this underdosing strategy is likely to be successful; adverse effects attributable to these medications are modest, and most that are experienced early in treatment (eg, headache, increased anxiety or irritability, sleep problems, gastrointestinal upset) are self-limiting and may be coincidental rather than medication-induced. Furthermore, there is no evidence for efficacy of subtherapeutic dosing in children in the acute phase of treatment or for preventing relapse.¹⁴ Thus, from an efficacy standpoint, a medication trial has not officially begun until the therapeutic dose range is reached.

Once dosing is within the therapeutic range, however, pediatric data differs from the adult literature. In most adult psychi­atric conditions, higher doses of SSRIs within the therapeutic range are associated with an increased response rate.^14,54 In pediatrics, there are few fixed dose trials, and once within the recommended therapeutic range, minimal data supports an association between higher dosing and higher efficacy.¹⁴ In general, pediatric guidelines are silent regarding optimal dosing of SSRIs within the recommended dose range, and higher antidepressant doses often result in a more significant adverse effect burden for children. One exception is pediatric OCD, where, similar to adults, the guidelines suggest that higher dosing of SSRIs often is required to induce a therapeutic response as compared to MDD and GAD.^31,55

If a child does not respond to adequate first-line treatment (or has a treatment history that cannot be fully verified), repeating these first-line interventions carries little risk and can be quite effective. For example, 60% of adolescents with MDD who did not initially respond to an SSRI demonstrated a significant response when prescribed a second SSRI or venlafaxine (with or without CBT).⁵⁶

When pediatric patients continue to experience significantly distressing and/or debilitating symptoms (particularly in MDD) despite multiple trials of antidepressants and psychotherapy, practitioners should consider a careful referral to interventional psychiatry services, which can include the more intensive treatments of electroconvulsive therapy, repetitive transcranial magnetic stimulation, or ketamine (see Box 1). Given the substantial morbidity and mortality associated with adolescent depression, interventional psychiatry treatments are under-researched and under-utilized clinically in pediatric populations.

Continue to: Antidepressants in general...

Antidepressants in general, and SSRIs in particular, are the first-line pharmacotherapy for pediatric anxiety, OCD, and MDD. For PTSD, although they are a first-line treatment in adults, their efficacy has not been demonstrated in children and adolescents. Antidepressants are generally safe, well-tolerated, and effective, with low NNTs (3 to 5 for anxiety and OCD; 4 to 12 in MDD, depending on whether industry trials are included). It is important that clinicians and families be educated about possible adverse effects and their time course in order to anticipate difficulties, ensure adequate informed consent, and monitor appropriately. The black-box warning regarding treatment-emergent suicidal thoughts or behaviors must be discussed (for suggested talking points, see Box 2). The NNH is large (100 to 143), and for many patients, the benefits will outweigh the risks. For pediatric patients who fail to respond to multiple adequate trials of antidepressants and psychotherapy, referrals for interventional psychiatry consultation should be considered.

Bottom Line

Although the evidence base for prescribing antidepressants for children and adolescents is smaller compared to the adult literature, properly understanding and prescribing these agents, and explaining their risks and benefits to families, can make a major difference in patient compliance, satisfaction, and outcomes. Antidepressants (particularly selective serotonin reuptake inhibitors) are the firstline pharmacologic intervention for pediatric patients with anxiety disorders, obsessive-compulsive disorder, or major depressive disorder.

Related Resource

• Bonin L, Moreland CS. Overview of prevention and treatment for pediatric depression. https://www.uptodate.com/contents/overview-of-prevention-and-treatment-for-pediatric-depression. Last reviewed July 2019.

Drug Brand Names

Bupropion • Wellbutrin, Zyban
Cimetidine • Tagamet
Citalopram • Celexa
Clomipramine • Anafranil
Desipramine • Norpramin
Desvenlafaxine • Pristiq
Duloxetine • Cymbalta
Escitalopram • Lexapro
Fluoxetine • Prozac
Fluvoxamine • Luvox
Imipramine • Tofranil
Mirtazapine • Remeron
Nortriptyline • Pamelor
Paroxetine • Paxil
Sertraline • Zoloft
Venlafaxine • Effexor
Vilazodone • Viibryd
Vortioxetine • Trintellix

Box 1

Box 2

Major depressive disorder (MDD) is a significant pediatric health problem, with a lifetime prevalence as high as 20% by the end of adolescence.^1-3 Major depressive disorder in adolescence is associated with significant morbidity, including poor social functioning, school difficulties, early pregnancy, and increased risk of physical illness and substance abuse.^4-6 It is also linked with significant mortality, with increased risk for suicide, which is now the second leading cause of death in individuals age 10 to 24 years.^1,7,8

As their name suggests, antidepressants comprise a group of medications that are used to treat MDD; they are also, however, first-line agents for generalized anxiety disorder (GAD), posttraumatic stress disorder (PTSD), and obsessive-compulsive disorder (OCD) in adults. Anxiety disorders (including GAD and other anxiety diagnoses) and PTSD are also common in childhood and adolescence with a combined lifetime prevalence ranging from 15% to 30%.^9,10 These disorders are also associated with increased risk of suicide.¹¹ For all of these disorders, depending on the severity of presentation and the preference of the patient, treatments are often a combination of psychotherapy and psychopharmacology.

Clinicians face several challenges when considering antidepressants for pediatric patients. Pediatricians and psychiatrists need to understand whether these medications work in children and adolescents, and whether there are unique developmental safety and tolerability issues. The evidence base in child psychiatry is considerably smaller compared with that of adult psychiatry. From this more limited evidence base also came the controversial “black-box” warning regarding a risk of emergent suicidality when starting antidepressants that accompanies all antidepressants for pediatric, but not adult, patients. This warning has had major effects on clinical encounters with children experiencing depression, including altering clinician prescribing behavior.¹²

In this article, we review the current evidence for antidepressant efficacy, tolerability, and safety in pediatric patients. We also suggest ways in which clinicians might choose, start, and stop antidepressants in children, as well as how to talk with parents about benefits, risks, and the black-box warning.

Do antidepressants work in children?

Selective serotonin reuptake inhibitors. Selective serotonin reuptake inhibitors (SSRIs) are the most commonly used class of antidepressants in both children and adults.¹³ While only a few SSRIs are FDA-approved for pediatric indications, the lack of FDA approval is typically related to a lack of sufficient testing in randomized controlled trials (RCTs) for specific pediatric indications, rather than to demonstrable differences in efficacy between antidepressant agents. Since there is currently no data to suggest inferiority of one agent compared to another in children or adults,^14,15 efficacy data will be discussed here as applied to the class of SSRIs, generalizing from RCTs conducted on individual drugs. Table 1 lists FDA indications and dosing information for individual antidepressants.

There is strong evidence that SSRIs are effective for treating pediatric anxiety disorders (eg, social anxiety disorder and GAD)¹⁶ and OCD,¹⁷ with numbers needed to treat (NNT) between 3 and 5. For both of these disorders, SSRIs combined with cognitive-behavioral therapy (CBT) have the highest likelihood of improving symptoms or achieving remission.^17,18

Selective serotonin reuptake inhibitors are also effective for treating pediatric MDD; however, the literature is more complex for this disorder compared to GAD and OCD as there are considerable differences in effect sizes between National Institute of Mental Health (NIMH)–funded studies and industry-sponsored trials.¹³ The major NIMH-sponsored adolescent depression trial, TADS (Treatment for Adolescents and Depression Study), showed that SSRIs (fluoxetine in this case) were quite effective, with an NNT of 4 over the acute phase (12 weeks).¹⁹ Ultimately, approximately 80% of adolescents improved over 9 months. Many industry-sponsored trials for MDD in pediatric patients had large placebo response rates (approximately 60%), which resulted in smaller between-group differences, and estimates of an NNT closer to 12,¹³ which has muddied the waters in meta-analyses that include all trials.²⁰ Improvement in depressive symptoms also appears to be bolstered by concomitant CBT in MDD,¹⁹ but not as robustly as in GAD and OCD. While the full benefit of SSRIs for depression may take as long as 8 weeks, a meta-analysis of depression studies of pediatric patients suggests that significant benefits from placebo are observed as early as 2 weeks, and that further treatment gains are minimal after 4 weeks.¹⁵ Thus, we recommend at least a 4- to 6-week trial at therapeutic dosing before deeming a medication a treatment failure.

Continue to: Posttraumatic stress disorder...

Posttraumatic stress disorder is a fourth disorder in which SSRIs are a first-line treatment in adults. The data for using SSRIs to treat pediatric patients with PTSD is scant, with only a few RCTs, and no large NIMH-funded trials. Randomized controlled trials have not demonstrated significant differences between SSRIs and placebo^21,22 and thus the current first-line recommendation in pediatric PTSD remains trauma-focused therapy, with good evidence for trauma-focused CBT.²³ Practically speaking, there can be considerable overlap of PTSD, depression, and anxiety symptoms in children,²³ and children with a history of trauma who also have comorbid MDD may benefit from medication if their symptoms persist despite an adequate trial of psychotherapy.

Taken together, the current evidence suggests that SSRIs are often effective in pediatric GAD, OCD, and MDD, with low NNTs (ranging from 3 to 5 based on NIMH-funded trials) for all of these disorders; there is not yet sufficient evidence of efficacy in pediatric patients with PTSD.

Fluoxetine has been studied more intensively than other SSRIs (for example, it was the antidepressant used in the TADS trial), and thus has the largest evidence base. For this reason, fluoxetine is often considered the first of the first-line options. Additionally, fluoxetine has a longer half-life than other antidepressants, which may make it more effective in situations where patients are likely to miss doses, and results in a lower risk of withdrawal symptoms when stopped due to “self-tapering.”

SNRIs and atypical antidepressants. Other antidepressants commonly used in pediatric patients but with far less evidence of efficacy include serotonin-norepinephrine reuptake inhibitors (SNRIs) and the atypical antidepressants bupropion and mirtazapine. The SNRI duloxetine is FDA-approved for treating GAD in children age 7 to 17, but there are no other pediatric indications for duloxetine, or for the other SNRIs.

In general, adverse effect profiles are worse for SNRIs compared to SSRIs, further limiting their utility. While there are no pediatric studies demonstrating SNRI efficacy for neuropathic pain, good data exists in adults.²⁴ Thus, an SNRI could be a reasonable option if a pediatric patient has failed prior adequate SSRI trials and also has comorbid neuropathic pain.

Continue to: Neither bupropion nor mirtazapine...

Neither bupropion nor mirtazapine have undergone rigorous testing in pediatric patients, and therefore these agents should generally be considered only once other first-line treatments have failed. Bupropion has been evaluated for attention-deficit/hyperactivity disorder (ADHD)²⁵ and for adolescent smoking cessation.²⁶ However, the evidence is weak, and bupropion is not considered a first-line option for children and adolescents.

Tricyclic antidepressants. Randomized controlled trials have demonstrated that tricyclic antidepressants (TCAs) are efficacious for treating several pediatric conditions; however, their significant side effect profile, their monitoring requirements, as well as their lethality in overdose has left them replaced by SSRIs in most cases. That said, they can be appropriate in refractory ADHD (desipramine^27,28) and refractory OCD (clomipramine is FDA-approved for this indication²⁹); they are considered a third-line treatment for enuresis.³⁰

Why did my patient stop the medication?

Common adverse effects. Although the greatest benefit of antidepressant medications compared with placebo is achieved relatively early on in treatment, it generally takes time for these benefits to accrue and become clinically apparent.^15,31 By contrast, most adverse effects of antidepressants present and are at their most severe early in treatment. The combination of early adverse effects and delayed efficacy leads many patients, families, and clinicians to discontinue medications before they have an adequate chance to work. Thus, it is imperative to provide psychoeducation before starting a medication about the typical time-course of improvement and adverse effects (Table 2).

Adverse effects of SSRIs often appear or worsen transiently during initiation of a medication, during a dose increase,³² or, theoretically, with the addition of a medication that interferes with SSRI metabolism (eg, cimetidine inhibition of cytochrome P450 2D6).³³ If families are prepared for this phenomenon and the therapeutic alliance is adequate, adverse effects can be tolerated to allow for a full medication trial. Common adverse effects of SSRIs include sleep problems (insomnia/sedation), gastrointestinal upset, sexual dysfunction, dry mouth, and hyperhidrosis. Although SSRIs differ somewhat in the frequency of these effects, as a class, they are more similar than different. Adequate psychoeducation is especially imperative in the treatment of OCD and anxiety disorders, where there is limited evidence of efficacy for any non-serotonergic antidepressants.

Serotonin-norepinephrine reuptake inhibitors are not considered first-line medications because of the reduced evidence base compared to SSRIs and their enhanced adverse effect profiles. Because SNRIs partially share a mechanism of action with SSRIs, they also share portions of the adverse effects profile. However, SNRIs have the additional adverse effect of hypertension, which is related to their noradrenergic activity. Thus, it is reasonable to obtain a baseline blood pressure before initiating an SNRI, as well as periodically after initiation and during dose increases, particularly if the patient has other risk factors for hypertension.³⁴

Continue to: Although TCAs have efficacy...

Although TCAs have efficacy in some pediatric disorders,^27-29,35 their adverse effect profile limits their use. Tricyclic antidepressants are highly anticholinergic (causing dizziness secondary to orthostatic hypotension, dry mouth, and urinary retention) and antihistaminergic (causing sedation and weight gain). Additionally, TCAs lower the seizure threshold and have adverse cardiac effects relating to their anti-alpha-1 adrenergic activity, resulting in dose-dependent increases in the QTc and cardiac toxicity in overdose that could lead to arrhythmia and death. These medications have their place, but their use requires careful informed consent, clear treatment goals, and baseline and periodic cardiac monitoring (via electrocardiogram).

Serious adverse effects. Clinicians may be hesitant to prescribe antidepressants for pediatric patients because of the potential for more serious adverse effects, including severe behavioral activation syndromes, serotonin syndrome, and emergent suicidality. However, current FDA-approved antidepressants arguably have one of the most positive risk/benefit profiles of any orally-administered medication approved for pediatric patients. Having a strong understanding of the evidence is critical to evaluating when it is appropriate to prescribe an antidepressant, how to properly monitor the patient, and how to obtain accurate informed consent.

Pediatric behavioral activation syndrome. Many clinicians report that children receiving antidepressants experience a pediatric behavioral activation syndrome, which exists along a spectrum from mild activation, increased energy, insomnia, or irritability up through more severe presentations of agitation, hyperactivity, or possibly mania. A recent meta-analysis suggested a positive association between antidepressant use and activation events on the milder end of this spectrum in pediatric patients with non-OCD anxiety disorders,¹⁶ and it is thought that compared with adolescents, younger children are more susceptible to activation adverse effects.³⁶ The likelihood of activation events has been associated with higher antidepressant plasma levels,³⁷ suggesting that dose or individual differences in metabolism may play a role. At the severe end of the spectrum, the risk of induction of mania in pediatric patients with depression or anxiety is relatively rare (<2%) and not statistically different from placebo in RCTs of pediatric participants.³⁸ Meta-analyses of larger randomized, placebo-controlled trials of adults do not support the idea that SSRIs and other second-generation antidepressants carry an increased risk of mania compared with placebo.^39,40 Children or adolescents with bona fide bipolar disorder (ie, patients who have had observed mania that meets all DSM-5 criteria) should be treated with a mood-stabilizing agent or antipsychotic if prescribed an antidepressant.⁴¹ These clear-cut cases are, however, relatively rare, and more often clinicians are confronted with ambiguous cases that include a family history of bipolar disorder along with “softer” symptoms of irritability, intrusiveness, or aggression. In these children, SSRIs may be appropriate for depressive, OCD, or anxiety symptoms, and should be strongly considered before prescribing antipsychotics or mood stabilizers, as long as initiated with proper monitoring.

Serotonin syndrome is a life-threatening condition caused by excess synaptic serotonin. It is characterized by confusion, sweating, diarrhea, hypertension, hyperthermia, and tachycardia. At its most severe, serotonin syndrome can result in seizures, arrhythmias, and death. The risk of serotonin syndrome is very low when using an SSRI as monotherapy. Risk increases with polypharmacy, particularly unexamined polypharmacy when multiple serotonergic agents are inadvertently on board. Commonly used serotonergic agents include other antidepressants, migraine medications (eg, triptans), some pain medications, and the cough suppressant dextromethorphan.

The easiest way to mitigate the risk of serotonin syndrome is to use an interaction index computer program, which can help ensure that the interacting agents are not prescribed without first discussing the risks and benefits. It is important to teach adolescents that certain recreational drugs are highly serotonergic and can cause serious interactions with antidepressants. For example, recreational use of dextrometh­orphan or 3,4-methylenedioxymethamphetamine (MDMA; commonly known as “ecstasy”) has been associated with serotonin syndrome in adolescents taking antidepressant medications.^42,43

Continue to: Suicidality

Suicidality. The black-box warning regarding a risk of emergent suicidality when starting antidepressant treatment in children is controversial.⁴⁴ The prospect that a medication intended to ameliorate depression might instead risk increasing suicidal thinking is alarming to parents and clinicians alike. To appropriately weigh and discuss the risks and benefits with families, it is important to understand the data upon which the warning is based.

In 2004, the FDA commissioned a review of 23 antidepressant trials, both published and unpublished, pooling studies across multiple indications (MDD, OCD, anxiety, and ADHD) and multiple antidepressant classes. This meta-analysis, which included nearly 4,400 pediatric patients, found a small but statistically significant increase in spontaneously-reported suicidal thoughts or actions, with a risk difference of 1% (95% confidence interval [CI], 1% to 2%).⁴⁵ These data suggest that if one treats 100 pediatric patients, 1 to 2 of them may experience short-term increases in suicidal thinking or behavior.⁴⁵ There were no differences in suicidal thinking when assessed systematically (ie, when all subjects reported symptoms of suicidal ideation on structured rating scales), and there were no completed suicides.⁴⁵ A subsequent analysis that included 27 pediatric trials suggested an even lower, although still significant, risk difference (<1%), yielding a number needed to harm (NNH) of 143.⁴⁶ Thus, with low NNT for efficacy (3 to 6) and relatively high NNH for emergent suicidal thoughts or behaviors (100 to 143), for many patients the benefits will outweigh the risks.

Figure 1, Figure 2, and Figure 3 are Cates plots that depict the absolute benefits of antidepressants compared with the risk of suicidality for pediatric patients with MDD, OCD, and anxiety disorders. Recent meta-analyses have suggested that the increased risk of suicidality in antidepressant trials is specific to studies that included children and adolescents, and is not observed in adult studies. A meta-analysis of 70 trials involving 18,526 participants suggested that the odds ratio of suicidality in trials of children and adolescents was 2.39 (95% CI, 1.31 to 4.33) compared with 0.81 (95% CI, 0.51 to 1.28) in adults.⁴⁷ Additionally, a network meta-analysis exclusively focusing on pediatric antidepressant trials in MDD reported significantly higher suicidality-related adverse events in venlafaxine trials compared with placebo, duloxetine, and several SSRIs (fluoxetine, paroxetine, and escitalopram).²⁰ These data should be interpreted with caution as differences in suicidality detected between agents is quite possibly related to differences in the method of assessment between trials, as opposed to actual differences in risk between agents.

Epidemiologic data further support the use of antidepressants in pediatric patients, showing that antidepressant use is associated with decreased teen suicide attempts and completions,⁴⁸ and the decline in prescriptions that occurred following the black-box warning was accompanied by a 14% increase in teen suicides.⁴⁹ Multiple hypotheses have been proposed to explain the pediatric clinical trial findings. One idea is that potential adverse effects of activation, or the intended effects of restoring the motivation, energy, and social engagement that is often impaired in depression, increases the likelihood of thinking about suicide or acting on thoughts. Another theory is that reporting of suicidality may be increased, rather than increased de novo suicidality itself. Antidepressants are effective for treating pediatric anxiety disorders, including social anxiety disorder,¹⁶ which could result in more willingness to report. Also, the manner in which adverse effects are generally ascertained in trials might have led to increased spontaneous reporting. In many trials, investigators ask whether participants have any adverse effects in general, and inquire about specific adverse effects only if the family answers affirmatively. Thus, the increased rate of other adverse effects associated with antidepressants (sleep problems, gastrointestinal upset, dry mouth, etc.) might trigger a specific question regarding suicidal ideation, which the child or family then may be more likely to report. Alternatively, any type of psychiatric treatment could increase an individual’s propensity to report; in adolescent psychotherapy trials, non-medicated participants have reported emergent suicidality at similar frequencies as those described in drug trials.⁵⁰ Regardless of the mechanism, the possibility of treatment-emergent suicidality is a low-frequency but serious event that necessitates careful monitoring when starting medication. Current guidelines suggest seeing children weekly for the first month after medication initiation, every 2 weeks for the following month, and monthly thereafter.⁵¹

Continue to: How long should the antidepressant be continued?

How long should the antidepressant be continued?

Many patients are concerned about how long they may be taking medication, and whether they will be taking an antidepressant “forever.” A treatment course can be broken into an acute phase, wherein remission is achieved and maintained for 6 to 8 weeks. This is followed by a continuation phase, with the goal of relapse prevention, lasting 16 to 20 weeks. The length of the last phase—the maintenance phase—depends both on the child’s history, the underlying therapeutic indication, the adverse effect burden experienced, and the family’s preferences/values. In general, for a first depressive episode, after treating for 1 year, a trial of discontinuation can be attempted with close monitoring. For a second depressive episode, we recommend 2 years of remission on antidepressant therapy before attempting discontinuation. In patients who have had 3 depressive episodes, or have had episodes of high severity, we recommend continuing antidepressant treatment indefinitely. Although much less well studied, the risk of relapse following SSRI discontinuation appears much more significant in OCD, whereas anxiety disorders and MDD have a relatively comparable risk.⁵²

In general, stopping an antidepressant should be done carefully and slowly. The speed with which a specific antidepressant can be stopped is largely related to its half-life. Agents with very long half-lives, such as fluoxetine (half-life of 5 days for the parent compound and 9 days for active metabolite), can often be stopped altogether, being “auto-tapered” by the long half-life. One might still consider a taper if the patient were taking high doses. Medications with shorter half-lives must be more carefully tapered to avoid discontinuation syndromes. Discontinuation syndromes are characterized by flu-like symptoms (nausea, myalgias, fatigue, dizziness) and worsening mood. Medications with short half-lives (eg, paroxetine and venlafaxine) have the highest potential for this syndrome in children,⁵³ and thus are used less frequently.

What to do when first-line treatments fail

When a child does not experience sufficient improvement from first-line treatments, it is crucial to determine whether they have experienced an adequate dosing, duration, and quality of medication and psychotherapy.

Adequate psychotherapy? To determine whether children are receiving adequate CBT, ask:

1. if the child receives homework from psychotherapy
2. if the parents are included in treatment
3. if therapy has involved identifying thought patterns that may be contributing to the child’s illness, and
4. if the therapist has ever exposed the child to a challenge likely to produce anxiety or distress in a supervised environment and has developed an exposure hierarchy (for conditions with primarily exposure-based therapies, such as OCD or anxiety disorders).

If a family is not receiving most of these elements in psychotherapy, this is a good indicator that they may not be receiving evidence-based CBT.

Continue to: Adequate pharmacotherapy?

Adequate pharmacotherapy? Similarly, when determining the adequacy of previous pharmacotherapy, it is critical to determine whether the child received an adequate dose of medications (at least the FDA-recommended minimum dose) for an adequate duration of time at therapeutic dosing (at least 6 weeks for MDD, 8 weeks for anxiety disorders, and 8 to 12 weeks for pediatric patients with OCD), and that the child actually took the medication regularly during that period. Patient compliance can typically be tracked through checking refill requests or intervals through the patient’s pharmacy. Ensuring proper delivery of first-line treatments is imperative because (1) the adverse effects associated with second-line treatments are often more substantial; (2) the cost in terms of time and money is considerably higher with second-line treatments, and; (3) the evidence regarding the benefits of these treatments is much less certain.

Inadequate dosing is a common reason for non-response in pediatric patients. Therapeutic dose ranges for common antidepressants are displayed in Table 1. Many clinicians underdose antidepressants for pediatric patients initially (and often throughout treatment) because they fear that the typical dose titration used in clinical trials will increase the risk of adverse effects compared with more conservative dosing. There is limited evidence to suggest that this underdosing strategy is likely to be successful; adverse effects attributable to these medications are modest, and most that are experienced early in treatment (eg, headache, increased anxiety or irritability, sleep problems, gastrointestinal upset) are self-limiting and may be coincidental rather than medication-induced. Furthermore, there is no evidence for efficacy of subtherapeutic dosing in children in the acute phase of treatment or for preventing relapse.¹⁴ Thus, from an efficacy standpoint, a medication trial has not officially begun until the therapeutic dose range is reached.

Once dosing is within the therapeutic range, however, pediatric data differs from the adult literature. In most adult psychi­atric conditions, higher doses of SSRIs within the therapeutic range are associated with an increased response rate.^14,54 In pediatrics, there are few fixed dose trials, and once within the recommended therapeutic range, minimal data supports an association between higher dosing and higher efficacy.¹⁴ In general, pediatric guidelines are silent regarding optimal dosing of SSRIs within the recommended dose range, and higher antidepressant doses often result in a more significant adverse effect burden for children. One exception is pediatric OCD, where, similar to adults, the guidelines suggest that higher dosing of SSRIs often is required to induce a therapeutic response as compared to MDD and GAD.^31,55

If a child does not respond to adequate first-line treatment (or has a treatment history that cannot be fully verified), repeating these first-line interventions carries little risk and can be quite effective. For example, 60% of adolescents with MDD who did not initially respond to an SSRI demonstrated a significant response when prescribed a second SSRI or venlafaxine (with or without CBT).⁵⁶

When pediatric patients continue to experience significantly distressing and/or debilitating symptoms (particularly in MDD) despite multiple trials of antidepressants and psychotherapy, practitioners should consider a careful referral to interventional psychiatry services, which can include the more intensive treatments of electroconvulsive therapy, repetitive transcranial magnetic stimulation, or ketamine (see Box 1). Given the substantial morbidity and mortality associated with adolescent depression, interventional psychiatry treatments are under-researched and under-utilized clinically in pediatric populations.

Continue to: Antidepressants in general...

Antidepressants in general, and SSRIs in particular, are the first-line pharmacotherapy for pediatric anxiety, OCD, and MDD. For PTSD, although they are a first-line treatment in adults, their efficacy has not been demonstrated in children and adolescents. Antidepressants are generally safe, well-tolerated, and effective, with low NNTs (3 to 5 for anxiety and OCD; 4 to 12 in MDD, depending on whether industry trials are included). It is important that clinicians and families be educated about possible adverse effects and their time course in order to anticipate difficulties, ensure adequate informed consent, and monitor appropriately. The black-box warning regarding treatment-emergent suicidal thoughts or behaviors must be discussed (for suggested talking points, see Box 2). The NNH is large (100 to 143), and for many patients, the benefits will outweigh the risks. For pediatric patients who fail to respond to multiple adequate trials of antidepressants and psychotherapy, referrals for interventional psychiatry consultation should be considered.

Bottom Line

Although the evidence base for prescribing antidepressants for children and adolescents is smaller compared to the adult literature, properly understanding and prescribing these agents, and explaining their risks and benefits to families, can make a major difference in patient compliance, satisfaction, and outcomes. Antidepressants (particularly selective serotonin reuptake inhibitors) are the firstline pharmacologic intervention for pediatric patients with anxiety disorders, obsessive-compulsive disorder, or major depressive disorder.

Related Resource

• Bonin L, Moreland CS. Overview of prevention and treatment for pediatric depression. https://www.uptodate.com/contents/overview-of-prevention-and-treatment-for-pediatric-depression. Last reviewed July 2019.

Drug Brand Names

Bupropion • Wellbutrin, Zyban
Cimetidine • Tagamet
Citalopram • Celexa
Clomipramine • Anafranil
Desipramine • Norpramin
Desvenlafaxine • Pristiq
Duloxetine • Cymbalta
Escitalopram • Lexapro
Fluoxetine • Prozac
Fluvoxamine • Luvox
Imipramine • Tofranil
Mirtazapine • Remeron
Nortriptyline • Pamelor
Paroxetine • Paxil
Sertraline • Zoloft
Venlafaxine • Effexor
Vilazodone • Viibryd
Vortioxetine • Trintellix

Box 1

Box 2

BANGKOK – The current gold standard for treatment of West syndrome remains hormonal therapy with either adrenocorticotropic hormone (ACTH) or high-dose prednisone as monotherapy rather than in combination with vigabatrin, Hiroki Nariai, MD, declared at the International Epilepsy Congress.

Bruce Jancin/MDedge News

West syndrome, or infantile spasms with a hypsarrhythmic EEG, is a severe infantile epileptic encephalopathy. It has high morbidity and mortality, and it’s challenging to treat. So neurologists and pediatricians were thrilled by an earlier preliminary report from an open-label, randomized, controlled trial conducted by the International Collaborative Infantile Spasms Study (ICISS) investigators. They reported that a hormonal therapy and vigabatrin (Sabril) combination provided significantly better seizure control between days 14 and 42 of treatment than hormonal therapy alone, albeit at the cost of more side effects (Lancet Neurol. 2017 Jan;16[1]:33-42).

However, a sobering update from the 377-infant study conducted in Australia, Switzerland, Germany, New Zealand, and the United Kingdom concluded that combination therapy didn’t result in improved developmental or epilepsy outcomes at 18 months, Dr. Nariai said at the congress sponsored by the International League Against Epilepsy.

“We still have inconclusive evidence to support the routine use of combination therapy. Clearly we need a better disease-modifying therapy because our best results with hormonal therapy or vigabatrin are only a 50%-70% response rate. And having a biomarker to guide early therapy and follow treatment response would help in establishing a better therapy,” commented Dr. Nariai, a pediatric neurologist at the University of California, Los Angeles.

He wasn’t involved in the international trial. He is, however, active in the search for a biomarker that would aid in speedier diagnosis of West syndrome, which in turn would allow for earlier treatment and, potentially, better outcomes. Indeed, Dr. Nariai has done pioneering work in identifying several EEG abnormalities readily measurable noninvasively using scalp electrodes that show considerable promise in this regard. These candidate biomarkers include ictal or interictal high-frequency oscillations at 80 Hz or more, along with cross-frequency coupling of high-frequency oscillations and delta-wave activity.

The primary endpoint in the ICISS study was developmental outcome at 18 months as evaluated using the Vineland Adaptive Behavior Scales composite score. The mean score was 73.9 in the combination therapy group and closely similar at 72.7 in the children on hormonal therapy alone. At 18 months, 30% of children in the combination therapy group carried a diagnosis of epilepsy, as did 29.2% of controls randomized to either high-dose oral steroids or intramuscular depot tetracosactide. About 15% of children randomized to combination therapy still had spasms at 18 months, as did 15.7% on hormonal therapy alone (Lancet Child Adolesc Health. 2018 Oct;2[10]:715-25).

The chief side effects of hormonal therapy included hypertension, hypoglycemia, and immunosuppression. Vigabatrin’s side effects included dose- and duration-dependent peripheral vision loss, movement disorders, and undesirable MRI signal changes.

Dr. Nariai observed that, even though hormonal therapy is widely used as first-line therapy in West syndrome, it remains surrounded by important unanswered questions.

“We don’t have head-to-head comparative studies of ACTH versus high-dose steroids, the optimal dosing protocol is not established, and we really don’t even know the mechanism of action for hormonal therapy and vigabatrin,” he said.

The study was sponsored by the U.K. National Institute of Health Research and other noncommercial entities. Dr. Nariai reported having no financial conflicts regarding his presentation.

bjancin@mdedge.com

BANGKOK – The current gold standard for treatment of West syndrome remains hormonal therapy with either adrenocorticotropic hormone (ACTH) or high-dose prednisone as monotherapy rather than in combination with vigabatrin, Hiroki Nariai, MD, declared at the International Epilepsy Congress.

Bruce Jancin/MDedge News

West syndrome, or infantile spasms with a hypsarrhythmic EEG, is a severe infantile epileptic encephalopathy. It has high morbidity and mortality, and it’s challenging to treat. So neurologists and pediatricians were thrilled by an earlier preliminary report from an open-label, randomized, controlled trial conducted by the International Collaborative Infantile Spasms Study (ICISS) investigators. They reported that a hormonal therapy and vigabatrin (Sabril) combination provided significantly better seizure control between days 14 and 42 of treatment than hormonal therapy alone, albeit at the cost of more side effects (Lancet Neurol. 2017 Jan;16[1]:33-42).

However, a sobering update from the 377-infant study conducted in Australia, Switzerland, Germany, New Zealand, and the United Kingdom concluded that combination therapy didn’t result in improved developmental or epilepsy outcomes at 18 months, Dr. Nariai said at the congress sponsored by the International League Against Epilepsy.

“We still have inconclusive evidence to support the routine use of combination therapy. Clearly we need a better disease-modifying therapy because our best results with hormonal therapy or vigabatrin are only a 50%-70% response rate. And having a biomarker to guide early therapy and follow treatment response would help in establishing a better therapy,” commented Dr. Nariai, a pediatric neurologist at the University of California, Los Angeles.

He wasn’t involved in the international trial. He is, however, active in the search for a biomarker that would aid in speedier diagnosis of West syndrome, which in turn would allow for earlier treatment and, potentially, better outcomes. Indeed, Dr. Nariai has done pioneering work in identifying several EEG abnormalities readily measurable noninvasively using scalp electrodes that show considerable promise in this regard. These candidate biomarkers include ictal or interictal high-frequency oscillations at 80 Hz or more, along with cross-frequency coupling of high-frequency oscillations and delta-wave activity.

The primary endpoint in the ICISS study was developmental outcome at 18 months as evaluated using the Vineland Adaptive Behavior Scales composite score. The mean score was 73.9 in the combination therapy group and closely similar at 72.7 in the children on hormonal therapy alone. At 18 months, 30% of children in the combination therapy group carried a diagnosis of epilepsy, as did 29.2% of controls randomized to either high-dose oral steroids or intramuscular depot tetracosactide. About 15% of children randomized to combination therapy still had spasms at 18 months, as did 15.7% on hormonal therapy alone (Lancet Child Adolesc Health. 2018 Oct;2[10]:715-25).

The chief side effects of hormonal therapy included hypertension, hypoglycemia, and immunosuppression. Vigabatrin’s side effects included dose- and duration-dependent peripheral vision loss, movement disorders, and undesirable MRI signal changes.

Dr. Nariai observed that, even though hormonal therapy is widely used as first-line therapy in West syndrome, it remains surrounded by important unanswered questions.

“We don’t have head-to-head comparative studies of ACTH versus high-dose steroids, the optimal dosing protocol is not established, and we really don’t even know the mechanism of action for hormonal therapy and vigabatrin,” he said.

The study was sponsored by the U.K. National Institute of Health Research and other noncommercial entities. Dr. Nariai reported having no financial conflicts regarding his presentation.

bjancin@mdedge.com

BANGKOK – The current gold standard for treatment of West syndrome remains hormonal therapy with either adrenocorticotropic hormone (ACTH) or high-dose prednisone as monotherapy rather than in combination with vigabatrin, Hiroki Nariai, MD, declared at the International Epilepsy Congress.

Bruce Jancin/MDedge News

West syndrome, or infantile spasms with a hypsarrhythmic EEG, is a severe infantile epileptic encephalopathy. It has high morbidity and mortality, and it’s challenging to treat. So neurologists and pediatricians were thrilled by an earlier preliminary report from an open-label, randomized, controlled trial conducted by the International Collaborative Infantile Spasms Study (ICISS) investigators. They reported that a hormonal therapy and vigabatrin (Sabril) combination provided significantly better seizure control between days 14 and 42 of treatment than hormonal therapy alone, albeit at the cost of more side effects (Lancet Neurol. 2017 Jan;16[1]:33-42).

However, a sobering update from the 377-infant study conducted in Australia, Switzerland, Germany, New Zealand, and the United Kingdom concluded that combination therapy didn’t result in improved developmental or epilepsy outcomes at 18 months, Dr. Nariai said at the congress sponsored by the International League Against Epilepsy.

“We still have inconclusive evidence to support the routine use of combination therapy. Clearly we need a better disease-modifying therapy because our best results with hormonal therapy or vigabatrin are only a 50%-70% response rate. And having a biomarker to guide early therapy and follow treatment response would help in establishing a better therapy,” commented Dr. Nariai, a pediatric neurologist at the University of California, Los Angeles.

He wasn’t involved in the international trial. He is, however, active in the search for a biomarker that would aid in speedier diagnosis of West syndrome, which in turn would allow for earlier treatment and, potentially, better outcomes. Indeed, Dr. Nariai has done pioneering work in identifying several EEG abnormalities readily measurable noninvasively using scalp electrodes that show considerable promise in this regard. These candidate biomarkers include ictal or interictal high-frequency oscillations at 80 Hz or more, along with cross-frequency coupling of high-frequency oscillations and delta-wave activity.

The primary endpoint in the ICISS study was developmental outcome at 18 months as evaluated using the Vineland Adaptive Behavior Scales composite score. The mean score was 73.9 in the combination therapy group and closely similar at 72.7 in the children on hormonal therapy alone. At 18 months, 30% of children in the combination therapy group carried a diagnosis of epilepsy, as did 29.2% of controls randomized to either high-dose oral steroids or intramuscular depot tetracosactide. About 15% of children randomized to combination therapy still had spasms at 18 months, as did 15.7% on hormonal therapy alone (Lancet Child Adolesc Health. 2018 Oct;2[10]:715-25).

The chief side effects of hormonal therapy included hypertension, hypoglycemia, and immunosuppression. Vigabatrin’s side effects included dose- and duration-dependent peripheral vision loss, movement disorders, and undesirable MRI signal changes.

Dr. Nariai observed that, even though hormonal therapy is widely used as first-line therapy in West syndrome, it remains surrounded by important unanswered questions.

“We don’t have head-to-head comparative studies of ACTH versus high-dose steroids, the optimal dosing protocol is not established, and we really don’t even know the mechanism of action for hormonal therapy and vigabatrin,” he said.

The study was sponsored by the U.K. National Institute of Health Research and other noncommercial entities. Dr. Nariai reported having no financial conflicts regarding his presentation.

bjancin@mdedge.com

The Food and Drug Administration on Aug. 27 approved Nourianz (istradefylline) tablets as an add-on treatment to levodopa/carbidopa in adult patients with Parkinson’s disease experiencing off episodes. During off episodes, patients’ medications do not work well, and symptoms such as tremor and difficulty walking increase.

bankrx/Getty Images

The effectiveness of Nourianz for this indication was shown in four 12-week placebo-controlled clinical studies that included 1,143 participants. In all four studies, patients treated with Nourianz experienced a statistically significant decrease from baseline in daily off time, compared with patients who received placebo.

The most common adverse reactions to istradefylline with an incidence of 5% or greater and occurring more frequently than with placebo were dyskinesia (15%, 17%, and 8%, for Nourianz 20 mg, 40 mg, and placebo, respectively), dizziness (3%, 6%, and 4%), constipation (5%, 6%, and 3%), nausea (4%, 6%, and 5%), hallucination (2%, 6%, and 3%), and insomnia (1%, 6%, and 4%). In clinical trials, 1% of patients treated with Nourianz 20 mg or 40 mg discontinued treatment because of dyskinesia, compared with no patients who received placebo.

In addition,one patient treated with Nourianz 40 mg experienced impulse control disorder, compared with no patients who received Nourianz 20 mg or placebo.

If hallucinations, psychotic behavior, or impulsive or compulsive behavior occurs, a dosage reduction or stoppage should be considered, according to the FDA. Use of Nourianz during pregnancy is not recommended, and women of childbearing potential should be advised to use contraception during treatment.

The maximum recommended dosage in patients taking strong CYP3A4 inhibitors is 20 mg once daily, and clinicians should avoid use of Nourianz with strong CYP3A4 inducers.

Istradefylline is the first adenosine A_2A receptor antagonist for use in Parkinson’s disease in the United States, and the drug provides patients with a novel nondopaminergic daily oral treatment option, according to a news release from Kyowa Kirin, the company that markets the drug.

Since 2013, istradefylline has been marketed at Nouriast in Japan, where it is indicated for the wearing-off phenomenon in patients with Parkinson’s disease who take preparations containing levodopa.

jremaly@mdedge.com

The Food and Drug Administration on Aug. 27 approved Nourianz (istradefylline) tablets as an add-on treatment to levodopa/carbidopa in adult patients with Parkinson’s disease experiencing off episodes. During off episodes, patients’ medications do not work well, and symptoms such as tremor and difficulty walking increase.

bankrx/Getty Images

The effectiveness of Nourianz for this indication was shown in four 12-week placebo-controlled clinical studies that included 1,143 participants. In all four studies, patients treated with Nourianz experienced a statistically significant decrease from baseline in daily off time, compared with patients who received placebo.

The most common adverse reactions to istradefylline with an incidence of 5% or greater and occurring more frequently than with placebo were dyskinesia (15%, 17%, and 8%, for Nourianz 20 mg, 40 mg, and placebo, respectively), dizziness (3%, 6%, and 4%), constipation (5%, 6%, and 3%), nausea (4%, 6%, and 5%), hallucination (2%, 6%, and 3%), and insomnia (1%, 6%, and 4%). In clinical trials, 1% of patients treated with Nourianz 20 mg or 40 mg discontinued treatment because of dyskinesia, compared with no patients who received placebo.

In addition,one patient treated with Nourianz 40 mg experienced impulse control disorder, compared with no patients who received Nourianz 20 mg or placebo.

If hallucinations, psychotic behavior, or impulsive or compulsive behavior occurs, a dosage reduction or stoppage should be considered, according to the FDA. Use of Nourianz during pregnancy is not recommended, and women of childbearing potential should be advised to use contraception during treatment.

The maximum recommended dosage in patients taking strong CYP3A4 inhibitors is 20 mg once daily, and clinicians should avoid use of Nourianz with strong CYP3A4 inducers.

Istradefylline is the first adenosine A_2A receptor antagonist for use in Parkinson’s disease in the United States, and the drug provides patients with a novel nondopaminergic daily oral treatment option, according to a news release from Kyowa Kirin, the company that markets the drug.

Since 2013, istradefylline has been marketed at Nouriast in Japan, where it is indicated for the wearing-off phenomenon in patients with Parkinson’s disease who take preparations containing levodopa.

jremaly@mdedge.com

The Food and Drug Administration on Aug. 27 approved Nourianz (istradefylline) tablets as an add-on treatment to levodopa/carbidopa in adult patients with Parkinson’s disease experiencing off episodes. During off episodes, patients’ medications do not work well, and symptoms such as tremor and difficulty walking increase.

bankrx/Getty Images

The effectiveness of Nourianz for this indication was shown in four 12-week placebo-controlled clinical studies that included 1,143 participants. In all four studies, patients treated with Nourianz experienced a statistically significant decrease from baseline in daily off time, compared with patients who received placebo.

The most common adverse reactions to istradefylline with an incidence of 5% or greater and occurring more frequently than with placebo were dyskinesia (15%, 17%, and 8%, for Nourianz 20 mg, 40 mg, and placebo, respectively), dizziness (3%, 6%, and 4%), constipation (5%, 6%, and 3%), nausea (4%, 6%, and 5%), hallucination (2%, 6%, and 3%), and insomnia (1%, 6%, and 4%). In clinical trials, 1% of patients treated with Nourianz 20 mg or 40 mg discontinued treatment because of dyskinesia, compared with no patients who received placebo.

In addition,one patient treated with Nourianz 40 mg experienced impulse control disorder, compared with no patients who received Nourianz 20 mg or placebo.

If hallucinations, psychotic behavior, or impulsive or compulsive behavior occurs, a dosage reduction or stoppage should be considered, according to the FDA. Use of Nourianz during pregnancy is not recommended, and women of childbearing potential should be advised to use contraception during treatment.

The maximum recommended dosage in patients taking strong CYP3A4 inhibitors is 20 mg once daily, and clinicians should avoid use of Nourianz with strong CYP3A4 inducers.

Istradefylline is the first adenosine A_2A receptor antagonist for use in Parkinson’s disease in the United States, and the drug provides patients with a novel nondopaminergic daily oral treatment option, according to a news release from Kyowa Kirin, the company that markets the drug.

Since 2013, istradefylline has been marketed at Nouriast in Japan, where it is indicated for the wearing-off phenomenon in patients with Parkinson’s disease who take preparations containing levodopa.

jremaly@mdedge.com

From 2006 to 2016, the prices of self-administered disease-modifying therapies for multiple sclerosis increased markedly, according to an analysis published in JAMA Neurology. The increased prices raise concern “because they demonstrate that the approval of new therapies did not ameliorate and could have even contributed to high inflation rates observed for incumbent drugs,” wrote the authors.

Four self-administered disease-modifying therapies (DMTs) for multiple sclerosis (MS) were available before 2009, and seven new branded DMTs were introduced after that year. Previous research indicated that the prices of DMTs for MS increased at higher rates than the prices of drugs for other disorders. How these price increases affected pharmaceutical spending during the past decade is uncertain, however.

A review of Medicare claims data

Alvaro San-Juan-Rodriguez, PharmD, a fellow in pharmacoeconomics, outcomes, and pharmacoanalytics research at the University of Pittsburgh, and colleagues examined claims data from 2006 to 2016 from a 5% random sample of Medicare beneficiaries. Information for a mean of 2.8 million Medicare beneficiaries per year was available. The researchers extracted all prescription claims for self-administered DMTs for MS (that is, glatiramer acetate, interferon beta-1a, interferon beta-1b, fingolimod, teriflunomide, dimethyl fumarate, and peginterferon beta-1a).

Dr. San-Juan-Rodriguez and associates chose three main outcomes. The first was the annual cost of treatment with each medication, which was based on Medicare Part D prescription claims gross costs and Food and Drug Administration–approved recommended dosing. The second was the market share of each medication, which the researchers defined as the proportion of pharmaceutical spending accounted for by each drug. The third was pharmaceutical spending per 1,000 Medicare beneficiaries for all drugs. The investigators also examined the relative contributions of Medicare Part D Plans’ payments, patients’ out-of-pocket costs, and other payments toward pharmaceutical spending.

Prices defied market expectations

The annual costs of treatment with self-administered DMTs for MS increased more than 300%. The mean annual cost was $18,660 in 2006 and $75,847 in 2016, and the mean annual rate of price increase was 12.8%. “Prices of most self-administered DMTs for MS increased in parallel, defying standard market expectations,” the investigators wrote.

Branded formulations of glatiramer acetate maintained the largest market share throughout the study period, ranging between 32.2% and 48.4%. However, the market share of platform therapies – glatiramer acetate, interferon beta-1a, and interferon beta-1b – decreased significantly from 2006 to 2016. Market shares for brand-name glatiramers declined from 36.7% to 32.2%, for intramuscular interferon beta-1a (30 mcg) from 32.3% to 14.2%, for interferon beta-1b from 18.7% to 4.5%, and for interferon beta-1a (8.8, 22, or 44 mcg) from 12.2% to 8.3%. The market shares of newer therapies, however, increased to 7.9% for fingolimod, 9.0% for teriflunomide, and 19.2% for dimethyl fumarate.

Pharmaceutical spending per 1,000 beneficiaries increased by a factor of 10.2 throughout the study period (from $7,794 to $79,411). Patients’ out-of-pocket spending per 1,000 beneficiaries increased by a factor of 7.2 (from $372 to $2,673). Furthermore, the relative contribution of federal payments toward pharmaceutical spending increased from 68.5% to 73.8%.

“Large increases in drug prices have not been specific to MS drugs,” said Dr. San-Juan-Rodriguez in an interview. “We previously described similar trends in other specialty medications used to treat severe disease states, such as tumor necrosis factor inhibitors [TNFi] for the treatment of rheumatoid arthritis. Yet these increases took place at a slower pace. For instance, list prices of TNFi increased at an average annual rate of 9.9% in the same time period, 2006-2016.

“It is important to acknowledge that rising list prices of drugs may partially reflect competition for rebates,” he added. “Yet the specific reasons behind the faster growth of prices of MS drugs, compared with the prices of drugs used in other disease states, remain uncertain.”

Neurologists should bear in mind that, although generic drugs are substantially cheaper than branded drugs, generic specialty medications do not always reduce costs for Medicare Part D beneficiaries. “On the contrary, due to incentive misalignments created by the Medicare Part D benefit design, beneficiaries using generic drugs such as Glatopa ... may pay more than those using the branded drug,” Dr. San-Juan-Rodriguez said.

What are neurologists’ responsibilities?

Although the original annual price of interferon beta-1b ($10,920) was stunning, physicians now recall it with nostalgia, wrote Daniel M. Hartung, PharmD, associate professor of biostatistics and epidemiology, and Dennis Bourdette, MD, professor of neurology, both at Oregon Health and Science University, Portland, in an accompanying editorial. “The prices for DMTs for MS have risen dramatically over the last 15 years, far outpacing inflation, and now have a mean price of more than $86,000 per year.”

Neurologists should be concerned about these rising prices, Dr. Hartung and Dr. Bourdette wrote. They should feel responsibility toward the health care system that pays for these medications, and toward patients who pay out of their own pockets. “Neurologists should be seeking to minimize the financial adverse effects of these therapies as much as they try to minimize physical adverse effects.”

One way for neurologists to address increasing prices is to urge state and federal lawmakers to pass legislation to curb them, they wrote. Neurologists also should reexamine their relationships with pharmaceutical and biotechnology companies. “Remaining silent should not be an option. ... Neurologists should not allow the unfettered increases in price for these drugs to hurt the health care system or patients.”

The Myers Family Foundation and the National Heart, Lung, and Blood Institute funded the research. Several authors are employees of health insurance companies such as the UPMC Health Plan Insurance Services Division and Humana. One author received personal fees from Pfizer that were unrelated to this study.

egreb@mdedge.com

SOURCEs: San-Juan-Rodriguez A et al. JAMA Neurol. 2019 Aug 26. doi: 10.1001/jamaneurol.2019.2711; Hartung DM and Bourdette D. JAMA Neurol. 2019 Aug 26. doi: 10.1001/jamaneurol.2019.2445.

From 2006 to 2016, the prices of self-administered disease-modifying therapies for multiple sclerosis increased markedly, according to an analysis published in JAMA Neurology. The increased prices raise concern “because they demonstrate that the approval of new therapies did not ameliorate and could have even contributed to high inflation rates observed for incumbent drugs,” wrote the authors.

Four self-administered disease-modifying therapies (DMTs) for multiple sclerosis (MS) were available before 2009, and seven new branded DMTs were introduced after that year. Previous research indicated that the prices of DMTs for MS increased at higher rates than the prices of drugs for other disorders. How these price increases affected pharmaceutical spending during the past decade is uncertain, however.

A review of Medicare claims data

Alvaro San-Juan-Rodriguez, PharmD, a fellow in pharmacoeconomics, outcomes, and pharmacoanalytics research at the University of Pittsburgh, and colleagues examined claims data from 2006 to 2016 from a 5% random sample of Medicare beneficiaries. Information for a mean of 2.8 million Medicare beneficiaries per year was available. The researchers extracted all prescription claims for self-administered DMTs for MS (that is, glatiramer acetate, interferon beta-1a, interferon beta-1b, fingolimod, teriflunomide, dimethyl fumarate, and peginterferon beta-1a).

Dr. San-Juan-Rodriguez and associates chose three main outcomes. The first was the annual cost of treatment with each medication, which was based on Medicare Part D prescription claims gross costs and Food and Drug Administration–approved recommended dosing. The second was the market share of each medication, which the researchers defined as the proportion of pharmaceutical spending accounted for by each drug. The third was pharmaceutical spending per 1,000 Medicare beneficiaries for all drugs. The investigators also examined the relative contributions of Medicare Part D Plans’ payments, patients’ out-of-pocket costs, and other payments toward pharmaceutical spending.

Prices defied market expectations

The annual costs of treatment with self-administered DMTs for MS increased more than 300%. The mean annual cost was $18,660 in 2006 and $75,847 in 2016, and the mean annual rate of price increase was 12.8%. “Prices of most self-administered DMTs for MS increased in parallel, defying standard market expectations,” the investigators wrote.

Branded formulations of glatiramer acetate maintained the largest market share throughout the study period, ranging between 32.2% and 48.4%. However, the market share of platform therapies – glatiramer acetate, interferon beta-1a, and interferon beta-1b – decreased significantly from 2006 to 2016. Market shares for brand-name glatiramers declined from 36.7% to 32.2%, for intramuscular interferon beta-1a (30 mcg) from 32.3% to 14.2%, for interferon beta-1b from 18.7% to 4.5%, and for interferon beta-1a (8.8, 22, or 44 mcg) from 12.2% to 8.3%. The market shares of newer therapies, however, increased to 7.9% for fingolimod, 9.0% for teriflunomide, and 19.2% for dimethyl fumarate.

Pharmaceutical spending per 1,000 beneficiaries increased by a factor of 10.2 throughout the study period (from $7,794 to $79,411). Patients’ out-of-pocket spending per 1,000 beneficiaries increased by a factor of 7.2 (from $372 to $2,673). Furthermore, the relative contribution of federal payments toward pharmaceutical spending increased from 68.5% to 73.8%.

“Large increases in drug prices have not been specific to MS drugs,” said Dr. San-Juan-Rodriguez in an interview. “We previously described similar trends in other specialty medications used to treat severe disease states, such as tumor necrosis factor inhibitors [TNFi] for the treatment of rheumatoid arthritis. Yet these increases took place at a slower pace. For instance, list prices of TNFi increased at an average annual rate of 9.9% in the same time period, 2006-2016.

“It is important to acknowledge that rising list prices of drugs may partially reflect competition for rebates,” he added. “Yet the specific reasons behind the faster growth of prices of MS drugs, compared with the prices of drugs used in other disease states, remain uncertain.”

Neurologists should bear in mind that, although generic drugs are substantially cheaper than branded drugs, generic specialty medications do not always reduce costs for Medicare Part D beneficiaries. “On the contrary, due to incentive misalignments created by the Medicare Part D benefit design, beneficiaries using generic drugs such as Glatopa ... may pay more than those using the branded drug,” Dr. San-Juan-Rodriguez said.

What are neurologists’ responsibilities?

Although the original annual price of interferon beta-1b ($10,920) was stunning, physicians now recall it with nostalgia, wrote Daniel M. Hartung, PharmD, associate professor of biostatistics and epidemiology, and Dennis Bourdette, MD, professor of neurology, both at Oregon Health and Science University, Portland, in an accompanying editorial. “The prices for DMTs for MS have risen dramatically over the last 15 years, far outpacing inflation, and now have a mean price of more than $86,000 per year.”

Neurologists should be concerned about these rising prices, Dr. Hartung and Dr. Bourdette wrote. They should feel responsibility toward the health care system that pays for these medications, and toward patients who pay out of their own pockets. “Neurologists should be seeking to minimize the financial adverse effects of these therapies as much as they try to minimize physical adverse effects.”

One way for neurologists to address increasing prices is to urge state and federal lawmakers to pass legislation to curb them, they wrote. Neurologists also should reexamine their relationships with pharmaceutical and biotechnology companies. “Remaining silent should not be an option. ... Neurologists should not allow the unfettered increases in price for these drugs to hurt the health care system or patients.”

The Myers Family Foundation and the National Heart, Lung, and Blood Institute funded the research. Several authors are employees of health insurance companies such as the UPMC Health Plan Insurance Services Division and Humana. One author received personal fees from Pfizer that were unrelated to this study.

egreb@mdedge.com

SOURCEs: San-Juan-Rodriguez A et al. JAMA Neurol. 2019 Aug 26. doi: 10.1001/jamaneurol.2019.2711; Hartung DM and Bourdette D. JAMA Neurol. 2019 Aug 26. doi: 10.1001/jamaneurol.2019.2445.

From 2006 to 2016, the prices of self-administered disease-modifying therapies for multiple sclerosis increased markedly, according to an analysis published in JAMA Neurology. The increased prices raise concern “because they demonstrate that the approval of new therapies did not ameliorate and could have even contributed to high inflation rates observed for incumbent drugs,” wrote the authors.

Four self-administered disease-modifying therapies (DMTs) for multiple sclerosis (MS) were available before 2009, and seven new branded DMTs were introduced after that year. Previous research indicated that the prices of DMTs for MS increased at higher rates than the prices of drugs for other disorders. How these price increases affected pharmaceutical spending during the past decade is uncertain, however.

A review of Medicare claims data

Alvaro San-Juan-Rodriguez, PharmD, a fellow in pharmacoeconomics, outcomes, and pharmacoanalytics research at the University of Pittsburgh, and colleagues examined claims data from 2006 to 2016 from a 5% random sample of Medicare beneficiaries. Information for a mean of 2.8 million Medicare beneficiaries per year was available. The researchers extracted all prescription claims for self-administered DMTs for MS (that is, glatiramer acetate, interferon beta-1a, interferon beta-1b, fingolimod, teriflunomide, dimethyl fumarate, and peginterferon beta-1a).

Dr. San-Juan-Rodriguez and associates chose three main outcomes. The first was the annual cost of treatment with each medication, which was based on Medicare Part D prescription claims gross costs and Food and Drug Administration–approved recommended dosing. The second was the market share of each medication, which the researchers defined as the proportion of pharmaceutical spending accounted for by each drug. The third was pharmaceutical spending per 1,000 Medicare beneficiaries for all drugs. The investigators also examined the relative contributions of Medicare Part D Plans’ payments, patients’ out-of-pocket costs, and other payments toward pharmaceutical spending.

Prices defied market expectations

The annual costs of treatment with self-administered DMTs for MS increased more than 300%. The mean annual cost was $18,660 in 2006 and $75,847 in 2016, and the mean annual rate of price increase was 12.8%. “Prices of most self-administered DMTs for MS increased in parallel, defying standard market expectations,” the investigators wrote.

Branded formulations of glatiramer acetate maintained the largest market share throughout the study period, ranging between 32.2% and 48.4%. However, the market share of platform therapies – glatiramer acetate, interferon beta-1a, and interferon beta-1b – decreased significantly from 2006 to 2016. Market shares for brand-name glatiramers declined from 36.7% to 32.2%, for intramuscular interferon beta-1a (30 mcg) from 32.3% to 14.2%, for interferon beta-1b from 18.7% to 4.5%, and for interferon beta-1a (8.8, 22, or 44 mcg) from 12.2% to 8.3%. The market shares of newer therapies, however, increased to 7.9% for fingolimod, 9.0% for teriflunomide, and 19.2% for dimethyl fumarate.

Pharmaceutical spending per 1,000 beneficiaries increased by a factor of 10.2 throughout the study period (from $7,794 to $79,411). Patients’ out-of-pocket spending per 1,000 beneficiaries increased by a factor of 7.2 (from $372 to $2,673). Furthermore, the relative contribution of federal payments toward pharmaceutical spending increased from 68.5% to 73.8%.

“Large increases in drug prices have not been specific to MS drugs,” said Dr. San-Juan-Rodriguez in an interview. “We previously described similar trends in other specialty medications used to treat severe disease states, such as tumor necrosis factor inhibitors [TNFi] for the treatment of rheumatoid arthritis. Yet these increases took place at a slower pace. For instance, list prices of TNFi increased at an average annual rate of 9.9% in the same time period, 2006-2016.

“It is important to acknowledge that rising list prices of drugs may partially reflect competition for rebates,” he added. “Yet the specific reasons behind the faster growth of prices of MS drugs, compared with the prices of drugs used in other disease states, remain uncertain.”

Neurologists should bear in mind that, although generic drugs are substantially cheaper than branded drugs, generic specialty medications do not always reduce costs for Medicare Part D beneficiaries. “On the contrary, due to incentive misalignments created by the Medicare Part D benefit design, beneficiaries using generic drugs such as Glatopa ... may pay more than those using the branded drug,” Dr. San-Juan-Rodriguez said.

What are neurologists’ responsibilities?

Although the original annual price of interferon beta-1b ($10,920) was stunning, physicians now recall it with nostalgia, wrote Daniel M. Hartung, PharmD, associate professor of biostatistics and epidemiology, and Dennis Bourdette, MD, professor of neurology, both at Oregon Health and Science University, Portland, in an accompanying editorial. “The prices for DMTs for MS have risen dramatically over the last 15 years, far outpacing inflation, and now have a mean price of more than $86,000 per year.”

Neurologists should be concerned about these rising prices, Dr. Hartung and Dr. Bourdette wrote. They should feel responsibility toward the health care system that pays for these medications, and toward patients who pay out of their own pockets. “Neurologists should be seeking to minimize the financial adverse effects of these therapies as much as they try to minimize physical adverse effects.”

One way for neurologists to address increasing prices is to urge state and federal lawmakers to pass legislation to curb them, they wrote. Neurologists also should reexamine their relationships with pharmaceutical and biotechnology companies. “Remaining silent should not be an option. ... Neurologists should not allow the unfettered increases in price for these drugs to hurt the health care system or patients.”

The Myers Family Foundation and the National Heart, Lung, and Blood Institute funded the research. Several authors are employees of health insurance companies such as the UPMC Health Plan Insurance Services Division and Humana. One author received personal fees from Pfizer that were unrelated to this study.

egreb@mdedge.com

SOURCEs: San-Juan-Rodriguez A et al. JAMA Neurol. 2019 Aug 26. doi: 10.1001/jamaneurol.2019.2711; Hartung DM and Bourdette D. JAMA Neurol. 2019 Aug 26. doi: 10.1001/jamaneurol.2019.2445.

The Food and Drug Administration has granted breakthrough therapy designation to acalabrutinib (Calquence) as a monotherapy for adults with chronic lymphocytic leukemia (CLL).

The Bruton tyrosine kinase inhibitor is already approved for the treatment of adults with mantle cell lymphoma who have received at least one prior therapy, and multiple trials are underway to evaluate the drug’s use in a variety of B-cell malignancies, according to the drug’s sponsor, AstraZeneca.

The current designation was based on preliminary results from two phase 3 trials – ELEVATE-TN and ASCEND. In the three-arm ELEVATE-TN trial, researchers evaluated acalabrutinib alone or in combination with obinutuzumab versus chlorambucil plus obinutuzumab in previously untreated patients with CLL. In the two-arm ASCEND trial, previously treated patients with CLL were randomized to receive acalabrutinib monotherapy or the physician’s choice of either rituximab plus idelalisib or rituximab plus bendamustine.

Interim analyses of the two trials showed that acalabrutinib alone, or in combination, significantly improved progression-free survival without raising safety concerns.

Breakthrough therapy designation allows for an expedited review by the FDA for treatments aimed at treating serious conditions where there is preliminary clinical evidence showing a substantial improvement over an available therapy or a clinically significant endpoint.

mschneider@mdedge.com

The Food and Drug Administration has granted breakthrough therapy designation to acalabrutinib (Calquence) as a monotherapy for adults with chronic lymphocytic leukemia (CLL).

The Bruton tyrosine kinase inhibitor is already approved for the treatment of adults with mantle cell lymphoma who have received at least one prior therapy, and multiple trials are underway to evaluate the drug’s use in a variety of B-cell malignancies, according to the drug’s sponsor, AstraZeneca.

The current designation was based on preliminary results from two phase 3 trials – ELEVATE-TN and ASCEND. In the three-arm ELEVATE-TN trial, researchers evaluated acalabrutinib alone or in combination with obinutuzumab versus chlorambucil plus obinutuzumab in previously untreated patients with CLL. In the two-arm ASCEND trial, previously treated patients with CLL were randomized to receive acalabrutinib monotherapy or the physician’s choice of either rituximab plus idelalisib or rituximab plus bendamustine.

Interim analyses of the two trials showed that acalabrutinib alone, or in combination, significantly improved progression-free survival without raising safety concerns.

Breakthrough therapy designation allows for an expedited review by the FDA for treatments aimed at treating serious conditions where there is preliminary clinical evidence showing a substantial improvement over an available therapy or a clinically significant endpoint.

mschneider@mdedge.com

The Food and Drug Administration has granted breakthrough therapy designation to acalabrutinib (Calquence) as a monotherapy for adults with chronic lymphocytic leukemia (CLL).

The Bruton tyrosine kinase inhibitor is already approved for the treatment of adults with mantle cell lymphoma who have received at least one prior therapy, and multiple trials are underway to evaluate the drug’s use in a variety of B-cell malignancies, according to the drug’s sponsor, AstraZeneca.

The current designation was based on preliminary results from two phase 3 trials – ELEVATE-TN and ASCEND. In the three-arm ELEVATE-TN trial, researchers evaluated acalabrutinib alone or in combination with obinutuzumab versus chlorambucil plus obinutuzumab in previously untreated patients with CLL. In the two-arm ASCEND trial, previously treated patients with CLL were randomized to receive acalabrutinib monotherapy or the physician’s choice of either rituximab plus idelalisib or rituximab plus bendamustine.

Interim analyses of the two trials showed that acalabrutinib alone, or in combination, significantly improved progression-free survival without raising safety concerns.

Breakthrough therapy designation allows for an expedited review by the FDA for treatments aimed at treating serious conditions where there is preliminary clinical evidence showing a substantial improvement over an available therapy or a clinically significant endpoint.

mschneider@mdedge.com

High-dose vitamin D supplementation provides no benefit for maintaining bone quality in healthy older adults without osteoporosis, findings from a 3-year, randomized clinical trial suggest.

Irina Shisterova/Getty Images

In fact, rather than a hypothesized increase in volumetric bone mineral density (BMD) with doses well above the recommended dietary allowance, a negative dose-response relationship was observed, Lauren A. Burt, PhD, of the McCaig Institute for Bone and Joint Health at the University of Calgary (Alta.) and colleagues found.

The total volumetric radial BMD was significantly lower in 101 and 97 study participants randomized to receive daily vitamin D₃ doses of 10,000 IU or 4,000 IU for 3 years, respectively (–7.5 and –3.9 mg of calcium hydroxyapatite [HA] per cm³), compared with 105 participants randomized to a reference group that received 400 IU (mean percent changes, –3.5%, –2.4%, and –1.2%, respectively). Total volumetric tibial BMD was also significantly lower in the 10,000 IU arm, compared with the reference arm (–4.1 mg HA per cm³; mean percent change –1.7% vs. –0.4%), the investigators reported Aug. 27 in JAMA.

There also were no significant differences seen between the three groups for the coprimary endpoint of bone strength at either the radius or tibia.

Participants in the double-blind trial were community-dwelling healthy men and women aged 55-70 years (mean age, 62.2 years) without osteoporosis and with baseline levels of 25-hydroxyvitamin D (25[OH]D) of 30-125 nmol/L. They were enrolled from a single center between August 2013 and December 2017 and treated with daily oral vitamin D₃ drops at the assigned dosage for 3 years and with calcium supplementation if dietary calcium intake was less than 1,200 mg daily.

Mean supplementation adherence was 99% among the 303 participants who completed the trial (out of 311 enrolled), and adherence was similar across the groups.

Baseline 25(OH)D levels in the 400 IU group were 76.3 nmol/L at baseline, 76.7 nmol/L at 3 months, and 77.4 nmol/L at 3 years. The corresponding measures for the 4,000 IU group were 81.3, 115.3, and 132.2 nmol/L, and for the 10,000 IU group, they were 78.4, 188.0, and 144.4, the investigators said, noting that significant group-by-time interactions were noted for volumetric BMD.

Bone strength decreased over time, but group-by-time interactions for that measure were not statistically significant, they said.

A total of 44 serious adverse events occurred in 38 participants (12.2%), and one death from presumed myocardial infarction occurred in the 400 IU group. Of eight prespecified adverse events, only hypercalcemia and hypercalciuria had significant dose-response effects; all episodes of hypercalcemia were mild and had resolved at follow-up, and the two hypercalcemia events, which occurred in one participant in the 10,000 IU group, were also transient. No significant difference in fall rates was seen in the three groups, they noted.

Vitamin D is considered beneficial for preventing and treating osteoporosis, and data support supplementation in individuals with 25(OH)D levels less than 30 nmol/L, but recent meta-analyses did not find a major treatment benefit for osteoporosis or for preventing falls and fractures, the investigators said.

Further, while most supplementation recommendations call for 400-2,000 IU daily, with a tolerable upper intake level of 4,000-10,000 IU, 3% of U.S. adults in 2013-2014 reported intake of at least 4,000 IU per day, but few studies have assessed the effects of doses at or above the upper intake level for 12 months or longer, they noted, adding that this study was “motivated by the prevalence of high-dose vitamin D supplementation among healthy adults.”

“It was hypothesized that a higher dose of vitamin D has a positive effect on high-resolution peripheral quantitative CT measures of volumetric density and strength, perhaps via suppression of parathyroid hormone (PTH)–mediated bone turnover,” they wrote.

However, based on the significantly lower radial BMD seen with both 4,000 and 10,000 IU, compared with 400 IU; the lower tibial BMD with 10,000 IU, compared with 400 IU; and the lack of a difference in bone strength at the radius and tibia, the findings do not support a benefit of high-dose vitamin D supplementation for bone health, they said, noting that additional study is needed to determine whether such doses are harmful.

“Because these results are in the opposite direction of the research hypothesis, this evidence of high-dose vitamin D having a negative effect on bone should be regarded as hypothesis generating, requiring confirmation with further research,” they concluded.

sworcester@mdedge.com

SOURCE: Burt L et al. JAMA. 2019 Aug 27;322(8):736-45.

High-dose vitamin D supplementation provides no benefit for maintaining bone quality in healthy older adults without osteoporosis, findings from a 3-year, randomized clinical trial suggest.

Irina Shisterova/Getty Images

In fact, rather than a hypothesized increase in volumetric bone mineral density (BMD) with doses well above the recommended dietary allowance, a negative dose-response relationship was observed, Lauren A. Burt, PhD, of the McCaig Institute for Bone and Joint Health at the University of Calgary (Alta.) and colleagues found.

The total volumetric radial BMD was significantly lower in 101 and 97 study participants randomized to receive daily vitamin D₃ doses of 10,000 IU or 4,000 IU for 3 years, respectively (–7.5 and –3.9 mg of calcium hydroxyapatite [HA] per cm³), compared with 105 participants randomized to a reference group that received 400 IU (mean percent changes, –3.5%, –2.4%, and –1.2%, respectively). Total volumetric tibial BMD was also significantly lower in the 10,000 IU arm, compared with the reference arm (–4.1 mg HA per cm³; mean percent change –1.7% vs. –0.4%), the investigators reported Aug. 27 in JAMA.

There also were no significant differences seen between the three groups for the coprimary endpoint of bone strength at either the radius or tibia.

Participants in the double-blind trial were community-dwelling healthy men and women aged 55-70 years (mean age, 62.2 years) without osteoporosis and with baseline levels of 25-hydroxyvitamin D (25[OH]D) of 30-125 nmol/L. They were enrolled from a single center between August 2013 and December 2017 and treated with daily oral vitamin D₃ drops at the assigned dosage for 3 years and with calcium supplementation if dietary calcium intake was less than 1,200 mg daily.

Mean supplementation adherence was 99% among the 303 participants who completed the trial (out of 311 enrolled), and adherence was similar across the groups.

Baseline 25(OH)D levels in the 400 IU group were 76.3 nmol/L at baseline, 76.7 nmol/L at 3 months, and 77.4 nmol/L at 3 years. The corresponding measures for the 4,000 IU group were 81.3, 115.3, and 132.2 nmol/L, and for the 10,000 IU group, they were 78.4, 188.0, and 144.4, the investigators said, noting that significant group-by-time interactions were noted for volumetric BMD.

Bone strength decreased over time, but group-by-time interactions for that measure were not statistically significant, they said.

A total of 44 serious adverse events occurred in 38 participants (12.2%), and one death from presumed myocardial infarction occurred in the 400 IU group. Of eight prespecified adverse events, only hypercalcemia and hypercalciuria had significant dose-response effects; all episodes of hypercalcemia were mild and had resolved at follow-up, and the two hypercalcemia events, which occurred in one participant in the 10,000 IU group, were also transient. No significant difference in fall rates was seen in the three groups, they noted.

Vitamin D is considered beneficial for preventing and treating osteoporosis, and data support supplementation in individuals with 25(OH)D levels less than 30 nmol/L, but recent meta-analyses did not find a major treatment benefit for osteoporosis or for preventing falls and fractures, the investigators said.

Further, while most supplementation recommendations call for 400-2,000 IU daily, with a tolerable upper intake level of 4,000-10,000 IU, 3% of U.S. adults in 2013-2014 reported intake of at least 4,000 IU per day, but few studies have assessed the effects of doses at or above the upper intake level for 12 months or longer, they noted, adding that this study was “motivated by the prevalence of high-dose vitamin D supplementation among healthy adults.”

“It was hypothesized that a higher dose of vitamin D has a positive effect on high-resolution peripheral quantitative CT measures of volumetric density and strength, perhaps via suppression of parathyroid hormone (PTH)–mediated bone turnover,” they wrote.

However, based on the significantly lower radial BMD seen with both 4,000 and 10,000 IU, compared with 400 IU; the lower tibial BMD with 10,000 IU, compared with 400 IU; and the lack of a difference in bone strength at the radius and tibia, the findings do not support a benefit of high-dose vitamin D supplementation for bone health, they said, noting that additional study is needed to determine whether such doses are harmful.

“Because these results are in the opposite direction of the research hypothesis, this evidence of high-dose vitamin D having a negative effect on bone should be regarded as hypothesis generating, requiring confirmation with further research,” they concluded.

sworcester@mdedge.com

SOURCE: Burt L et al. JAMA. 2019 Aug 27;322(8):736-45.

High-dose vitamin D supplementation provides no benefit for maintaining bone quality in healthy older adults without osteoporosis, findings from a 3-year, randomized clinical trial suggest.

Irina Shisterova/Getty Images

In fact, rather than a hypothesized increase in volumetric bone mineral density (BMD) with doses well above the recommended dietary allowance, a negative dose-response relationship was observed, Lauren A. Burt, PhD, of the McCaig Institute for Bone and Joint Health at the University of Calgary (Alta.) and colleagues found.

The total volumetric radial BMD was significantly lower in 101 and 97 study participants randomized to receive daily vitamin D₃ doses of 10,000 IU or 4,000 IU for 3 years, respectively (–7.5 and –3.9 mg of calcium hydroxyapatite [HA] per cm³), compared with 105 participants randomized to a reference group that received 400 IU (mean percent changes, –3.5%, –2.4%, and –1.2%, respectively). Total volumetric tibial BMD was also significantly lower in the 10,000 IU arm, compared with the reference arm (–4.1 mg HA per cm³; mean percent change –1.7% vs. –0.4%), the investigators reported Aug. 27 in JAMA.

There also were no significant differences seen between the three groups for the coprimary endpoint of bone strength at either the radius or tibia.

Participants in the double-blind trial were community-dwelling healthy men and women aged 55-70 years (mean age, 62.2 years) without osteoporosis and with baseline levels of 25-hydroxyvitamin D (25[OH]D) of 30-125 nmol/L. They were enrolled from a single center between August 2013 and December 2017 and treated with daily oral vitamin D₃ drops at the assigned dosage for 3 years and with calcium supplementation if dietary calcium intake was less than 1,200 mg daily.

Mean supplementation adherence was 99% among the 303 participants who completed the trial (out of 311 enrolled), and adherence was similar across the groups.

Baseline 25(OH)D levels in the 400 IU group were 76.3 nmol/L at baseline, 76.7 nmol/L at 3 months, and 77.4 nmol/L at 3 years. The corresponding measures for the 4,000 IU group were 81.3, 115.3, and 132.2 nmol/L, and for the 10,000 IU group, they were 78.4, 188.0, and 144.4, the investigators said, noting that significant group-by-time interactions were noted for volumetric BMD.

Bone strength decreased over time, but group-by-time interactions for that measure were not statistically significant, they said.

A total of 44 serious adverse events occurred in 38 participants (12.2%), and one death from presumed myocardial infarction occurred in the 400 IU group. Of eight prespecified adverse events, only hypercalcemia and hypercalciuria had significant dose-response effects; all episodes of hypercalcemia were mild and had resolved at follow-up, and the two hypercalcemia events, which occurred in one participant in the 10,000 IU group, were also transient. No significant difference in fall rates was seen in the three groups, they noted.

Vitamin D is considered beneficial for preventing and treating osteoporosis, and data support supplementation in individuals with 25(OH)D levels less than 30 nmol/L, but recent meta-analyses did not find a major treatment benefit for osteoporosis or for preventing falls and fractures, the investigators said.

Further, while most supplementation recommendations call for 400-2,000 IU daily, with a tolerable upper intake level of 4,000-10,000 IU, 3% of U.S. adults in 2013-2014 reported intake of at least 4,000 IU per day, but few studies have assessed the effects of doses at or above the upper intake level for 12 months or longer, they noted, adding that this study was “motivated by the prevalence of high-dose vitamin D supplementation among healthy adults.”

“It was hypothesized that a higher dose of vitamin D has a positive effect on high-resolution peripheral quantitative CT measures of volumetric density and strength, perhaps via suppression of parathyroid hormone (PTH)–mediated bone turnover,” they wrote.

However, based on the significantly lower radial BMD seen with both 4,000 and 10,000 IU, compared with 400 IU; the lower tibial BMD with 10,000 IU, compared with 400 IU; and the lack of a difference in bone strength at the radius and tibia, the findings do not support a benefit of high-dose vitamin D supplementation for bone health, they said, noting that additional study is needed to determine whether such doses are harmful.

“Because these results are in the opposite direction of the research hypothesis, this evidence of high-dose vitamin D having a negative effect on bone should be regarded as hypothesis generating, requiring confirmation with further research,” they concluded.

sworcester@mdedge.com

SOURCE: Burt L et al. JAMA. 2019 Aug 27;322(8):736-45.

The Food and Drug Administration has approved a subcutaneous injection formulation of ixekizumab (Taltz) at 80 mg/mL for the treatment of adult patients with active ankylosing spondylitis (AS), according to a press release from Eli Lilly.

Olivier Le Moal/Getty Images

AS is the third indication for ixekizumab, along with moderate to severe plaque psoriasis in adult patients who are candidates for systemic therapy or phototherapy and active psoriatic arthritis in adults.

Approval of the humanized interleukin-17A antagonist was based on results from a pair of randomized, double-blind, placebo-controlled, phase 3 studies involving 657 adult patients with active AS: the COAST-V trial in those naive to biologic disease-modifying antirheumatic drugs (bDMARDs) and the COAST-W trial in those who were intolerant or had inadequate response to tumor necrosis factor (TNF) inhibitors. The primary endpoint in both trials was achievement of 40% improvement in Assessment of Spondyloarthritis International Society criteria (ASAS40) at 16 weeks, compared with placebo.

In COAST-V, 48% of patients who received ixekizumab achieved ASAS40, compared with 18% of controls (P less than .0001). In COAST-W, 25% of patients who received ixekizumab achieved ASAS40 versus 13% of controls (P less than .05). The adverse events reported during both trials were consistent with the safety profile in patients who receive ixekizumab for the treatment of plaque psoriasis, including injection-site reactions, upper respiratory tract infections, nausea, and tinea infections.

“Results from the phase 3 clinical trial program in ankylosing spondylitis show that Taltz helped reduce pain and inflammation and improve function in patients who had never been treated with a bDMARD as well as those who previously failed TNF inhibitors. This approval is an important milestone for patients and physicians who are looking for a much-needed alternative to address symptoms of AS,” said Philip Mease, MD, of Providence St. Joseph Health and the University of Washington, both in Seattle.

lfranki@mdedge.com

The Food and Drug Administration has approved a subcutaneous injection formulation of ixekizumab (Taltz) at 80 mg/mL for the treatment of adult patients with active ankylosing spondylitis (AS), according to a press release from Eli Lilly.

Olivier Le Moal/Getty Images

AS is the third indication for ixekizumab, along with moderate to severe plaque psoriasis in adult patients who are candidates for systemic therapy or phototherapy and active psoriatic arthritis in adults.

Approval of the humanized interleukin-17A antagonist was based on results from a pair of randomized, double-blind, placebo-controlled, phase 3 studies involving 657 adult patients with active AS: the COAST-V trial in those naive to biologic disease-modifying antirheumatic drugs (bDMARDs) and the COAST-W trial in those who were intolerant or had inadequate response to tumor necrosis factor (TNF) inhibitors. The primary endpoint in both trials was achievement of 40% improvement in Assessment of Spondyloarthritis International Society criteria (ASAS40) at 16 weeks, compared with placebo.

In COAST-V, 48% of patients who received ixekizumab achieved ASAS40, compared with 18% of controls (P less than .0001). In COAST-W, 25% of patients who received ixekizumab achieved ASAS40 versus 13% of controls (P less than .05). The adverse events reported during both trials were consistent with the safety profile in patients who receive ixekizumab for the treatment of plaque psoriasis, including injection-site reactions, upper respiratory tract infections, nausea, and tinea infections.

“Results from the phase 3 clinical trial program in ankylosing spondylitis show that Taltz helped reduce pain and inflammation and improve function in patients who had never been treated with a bDMARD as well as those who previously failed TNF inhibitors. This approval is an important milestone for patients and physicians who are looking for a much-needed alternative to address symptoms of AS,” said Philip Mease, MD, of Providence St. Joseph Health and the University of Washington, both in Seattle.

lfranki@mdedge.com

The Food and Drug Administration has approved a subcutaneous injection formulation of ixekizumab (Taltz) at 80 mg/mL for the treatment of adult patients with active ankylosing spondylitis (AS), according to a press release from Eli Lilly.

Olivier Le Moal/Getty Images

AS is the third indication for ixekizumab, along with moderate to severe plaque psoriasis in adult patients who are candidates for systemic therapy or phototherapy and active psoriatic arthritis in adults.

Approval of the humanized interleukin-17A antagonist was based on results from a pair of randomized, double-blind, placebo-controlled, phase 3 studies involving 657 adult patients with active AS: the COAST-V trial in those naive to biologic disease-modifying antirheumatic drugs (bDMARDs) and the COAST-W trial in those who were intolerant or had inadequate response to tumor necrosis factor (TNF) inhibitors. The primary endpoint in both trials was achievement of 40% improvement in Assessment of Spondyloarthritis International Society criteria (ASAS40) at 16 weeks, compared with placebo.

In COAST-V, 48% of patients who received ixekizumab achieved ASAS40, compared with 18% of controls (P less than .0001). In COAST-W, 25% of patients who received ixekizumab achieved ASAS40 versus 13% of controls (P less than .05). The adverse events reported during both trials were consistent with the safety profile in patients who receive ixekizumab for the treatment of plaque psoriasis, including injection-site reactions, upper respiratory tract infections, nausea, and tinea infections.

“Results from the phase 3 clinical trial program in ankylosing spondylitis show that Taltz helped reduce pain and inflammation and improve function in patients who had never been treated with a bDMARD as well as those who previously failed TNF inhibitors. This approval is an important milestone for patients and physicians who are looking for a much-needed alternative to address symptoms of AS,” said Philip Mease, MD, of Providence St. Joseph Health and the University of Washington, both in Seattle.

lfranki@mdedge.com

BANGKOK – Intranasal midazolam is a legitimate first-line option for treatment of status epilepticus in patients who don’t already have an intravenous line in place, Lara Kay, MD, said at the International Epilepsy Congress.

Bruce Jancin/MDedge News

Why? Because status epilepticus is a major medical emergency. It’s associated with substantial morbidity and mortality. And of the various factors that influence outcome in status epilepticus – including age, underlying etiology, and level of consciousness – only one is potentially within physician control: time to treatment, she noted at the congress sponsored by the International League Against Epilepsy.

“Time is brain,” observed Dr. Kay, a neurologist at the epilepsy center at University Hospital Frankfurt.

While intravenous benzodiazepines – for example, lorazepam at 2-4 mg – are widely accepted as the time-honored first-line treatment for status epilepticus, trying to place a line in a patient experiencing this emergency can be a tricky, time-consuming business. Multiple studies have demonstrated that various nonintravenous formulations of benzodiazepines, such as rectal diazepam or buccal or intramuscular midazolam, can be administered much faster and are as effective as intravenous benzodiazepines. But buccal midazolam is quite expensive in Germany, and the ready-to-use intramuscular midazolam applicator that’s available in the United States isn’t marketed in Germany. So several years ago Dr. Kay and her fellow neurologists started having their university hospital pharmacy manufacture intranasal midazolam.

Dr. Kay presented an observational study of 42 consecutive patients with status epilepticus who received intranasal midazolam as first-line treatment. The patients had a mean age of nearly 53 years and 23 were women. The starting dose was 2.5 mg per nostril, moving up to 5 mg per nostril after waiting 5 minutes in initial nonresponders.

Status epilepticus ceased both clinically and by EEG in 24 of the 42 patients, or 57%, in an average of 5 minutes after administration of the intranasal medication at a mean dose of 5.6 mg. Nonresponders received a mean dose of 7.5 mg. There were no significant differences between responders and nonresponders in terms of the proportion presenting with preexisting epilepsy or the epilepsy etiology. However, responders presented at a mean of 54 minutes in status epilepticus, while nonresponders had been in status for 17 minutes.

The 57% response rate with intranasal midazolam is comparable with other investigators’ reported success rates using other benzodiazepines and routes of administration, she noted.

Session cochair Gregory Krauss, MD, commented that he thought the Frankfurt neurologists may have been too cautious in their dosing of intranasal midazolam for status epilepticus.

“Often in the U.S. 5 mg is initially used in each nostril,” according to Dr. Krauss, professor of neurology at Johns Hopkins University, Baltimore.

Dr. Kay reported having no financial conflicts of interest regarding her study.

bjancin@mdedge.com

SOURCE: Kay L et al. IEC 2019, Abstract P029.

BANGKOK – Intranasal midazolam is a legitimate first-line option for treatment of status epilepticus in patients who don’t already have an intravenous line in place, Lara Kay, MD, said at the International Epilepsy Congress.

Bruce Jancin/MDedge News

Why? Because status epilepticus is a major medical emergency. It’s associated with substantial morbidity and mortality. And of the various factors that influence outcome in status epilepticus – including age, underlying etiology, and level of consciousness – only one is potentially within physician control: time to treatment, she noted at the congress sponsored by the International League Against Epilepsy.

“Time is brain,” observed Dr. Kay, a neurologist at the epilepsy center at University Hospital Frankfurt.

While intravenous benzodiazepines – for example, lorazepam at 2-4 mg – are widely accepted as the time-honored first-line treatment for status epilepticus, trying to place a line in a patient experiencing this emergency can be a tricky, time-consuming business. Multiple studies have demonstrated that various nonintravenous formulations of benzodiazepines, such as rectal diazepam or buccal or intramuscular midazolam, can be administered much faster and are as effective as intravenous benzodiazepines. But buccal midazolam is quite expensive in Germany, and the ready-to-use intramuscular midazolam applicator that’s available in the United States isn’t marketed in Germany. So several years ago Dr. Kay and her fellow neurologists started having their university hospital pharmacy manufacture intranasal midazolam.

Dr. Kay presented an observational study of 42 consecutive patients with status epilepticus who received intranasal midazolam as first-line treatment. The patients had a mean age of nearly 53 years and 23 were women. The starting dose was 2.5 mg per nostril, moving up to 5 mg per nostril after waiting 5 minutes in initial nonresponders.

Status epilepticus ceased both clinically and by EEG in 24 of the 42 patients, or 57%, in an average of 5 minutes after administration of the intranasal medication at a mean dose of 5.6 mg. Nonresponders received a mean dose of 7.5 mg. There were no significant differences between responders and nonresponders in terms of the proportion presenting with preexisting epilepsy or the epilepsy etiology. However, responders presented at a mean of 54 minutes in status epilepticus, while nonresponders had been in status for 17 minutes.

The 57% response rate with intranasal midazolam is comparable with other investigators’ reported success rates using other benzodiazepines and routes of administration, she noted.

Session cochair Gregory Krauss, MD, commented that he thought the Frankfurt neurologists may have been too cautious in their dosing of intranasal midazolam for status epilepticus.

“Often in the U.S. 5 mg is initially used in each nostril,” according to Dr. Krauss, professor of neurology at Johns Hopkins University, Baltimore.

Dr. Kay reported having no financial conflicts of interest regarding her study.

bjancin@mdedge.com

SOURCE: Kay L et al. IEC 2019, Abstract P029.

BANGKOK – Intranasal midazolam is a legitimate first-line option for treatment of status epilepticus in patients who don’t already have an intravenous line in place, Lara Kay, MD, said at the International Epilepsy Congress.

Bruce Jancin/MDedge News

Why? Because status epilepticus is a major medical emergency. It’s associated with substantial morbidity and mortality. And of the various factors that influence outcome in status epilepticus – including age, underlying etiology, and level of consciousness – only one is potentially within physician control: time to treatment, she noted at the congress sponsored by the International League Against Epilepsy.

“Time is brain,” observed Dr. Kay, a neurologist at the epilepsy center at University Hospital Frankfurt.

While intravenous benzodiazepines – for example, lorazepam at 2-4 mg – are widely accepted as the time-honored first-line treatment for status epilepticus, trying to place a line in a patient experiencing this emergency can be a tricky, time-consuming business. Multiple studies have demonstrated that various nonintravenous formulations of benzodiazepines, such as rectal diazepam or buccal or intramuscular midazolam, can be administered much faster and are as effective as intravenous benzodiazepines. But buccal midazolam is quite expensive in Germany, and the ready-to-use intramuscular midazolam applicator that’s available in the United States isn’t marketed in Germany. So several years ago Dr. Kay and her fellow neurologists started having their university hospital pharmacy manufacture intranasal midazolam.

Dr. Kay presented an observational study of 42 consecutive patients with status epilepticus who received intranasal midazolam as first-line treatment. The patients had a mean age of nearly 53 years and 23 were women. The starting dose was 2.5 mg per nostril, moving up to 5 mg per nostril after waiting 5 minutes in initial nonresponders.

Status epilepticus ceased both clinically and by EEG in 24 of the 42 patients, or 57%, in an average of 5 minutes after administration of the intranasal medication at a mean dose of 5.6 mg. Nonresponders received a mean dose of 7.5 mg. There were no significant differences between responders and nonresponders in terms of the proportion presenting with preexisting epilepsy or the epilepsy etiology. However, responders presented at a mean of 54 minutes in status epilepticus, while nonresponders had been in status for 17 minutes.

The 57% response rate with intranasal midazolam is comparable with other investigators’ reported success rates using other benzodiazepines and routes of administration, she noted.

Session cochair Gregory Krauss, MD, commented that he thought the Frankfurt neurologists may have been too cautious in their dosing of intranasal midazolam for status epilepticus.

“Often in the U.S. 5 mg is initially used in each nostril,” according to Dr. Krauss, professor of neurology at Johns Hopkins University, Baltimore.

Dr. Kay reported having no financial conflicts of interest regarding her study.

bjancin@mdedge.com

SOURCE: Kay L et al. IEC 2019, Abstract P029.