In chronic heart failure, which beta-blocker is typically initiated at 3.125 mg twice daily?

In chronic heart failure, which beta-blocker is typically initiated at 3.125 mg twice daily?

• A. Metoprolol
• B. Carvedilol
• C. Bisoprolol
• D. Nebivolol

Answer: (B)

Starting dose for chronic heart failure therapy with a beta-blocker is carvedilol, given at 3.125 mg twice daily. This very low initial dose helps minimize the risk of symptomatic hypotension and bradycardia in patients whose heart failure has reduced perfusion and may be sensitive to sudden drops in blood pressure. Carvedilol is a nonselective beta-blocker with additional alpha-1 blocking activity, which lowers systemic vascular resistance and can improve hemodynamics when started carefully. After beginning at 3.125 mg twice daily, the dose is titrated every couple of weeks toward a target of 25 mg twice daily in patients weighing 85 kg or less, or 50 mg twice daily if heavier. Other beta-blockers used in heart failure have different starting doses and titration schedules (for example, metoprolol succinate typically starts around 12.5–25 mg daily, bisoprolol at 1.25 mg daily, nebivolol around 1 mg daily), so the 3.125 mg twice daily initiation is characteristic of carvedilol.

Starting dose for chronic heart failure therapy with a beta-blocker is carvedilol, given at 3.125 mg twice daily. This very low initial dose helps minimize the risk of symptomatic hypotension and bradycardia in patients whose heart failure has reduced perfusion and may be sensitive to sudden drops in blood pressure. Carvedilol is a nonselective beta-blocker with additional alpha-1 blocking activity, which lowers systemic vascular resistance and can improve hemodynamics when started carefully. After beginning at 3.125 mg twice daily, the dose is titrated every couple of weeks toward a target of 25 mg twice daily in patients weighing 85 kg or less, or 50 mg twice daily if heavier. Other beta-blockers used in heart failure have different starting doses and titration schedules (for example, metoprolol succinate typically starts around 12.5–25 mg daily, bisoprolol at 1.25 mg daily, nebivolol around 1 mg daily), so the 3.125 mg twice daily initiation is characteristic of carvedilol.