Dronedarone

Dronedarone is an antiarrhythmic drug used to treat specific types of atrial fibrillation. It works by blocking multiple ion channels in heart muscle cells to help maintain a normal heart rhythm. Its primary clinical benefit is reducing the need for hospitalization in patients with a history of paroxysmal or persistent AFib.

Verdict

A specialized drug for AFib with serious risks requiring expert supervision.

Protocol

• 400 mg taken orally twice daily with morning and evening meals.

Flags

• Black box warning: Increased risk of death, stroke, and heart failure in patients with permanent atrial fibrillation.
• Contraindicated in patients with symptomatic heart failure with recent decompensation or NYHA Class IV heart failure.
• Risk of severe liver injury, including cases requiring liver transplantation.
• Interacts with many common drugs, including strong CYP3A4 inhibitors (e.g., ketoconazole, grapefruit juice) and inducers.
• Can cause QT interval prolongation, increasing the risk of dangerous arrhythmias (Torsades de pointes).
• Common side effects include diarrhea, nausea, abdominal pain, and bradycardia (slow heart rate).