Key takeaways
Dronedarone (Multaq) and flecainide are both antiarrhythmic medications used to treat abnormal heart rhythms, such as atrial fibrillation. However, they belong to different classes of antiarrhythmics and have distinct uses and characteristics. Dronedarone is specifically used to lower the risk of hospitalization in adults with atrial fibrillation, while flecainide is used to prevent paroxysmal atrial fibrillation/flutter, paroxysmal supraventricular tachycardia, and ventricular arrhythmias. Dronedarone is taken as a 400 mg tablet twice daily with food, whereas flecainide's dosage varies based on the condition being treated, typically starting at 50 mg or 100 mg twice daily. Dronedarone is only available as a brand-name medication, while flecainide is available in generic form. Common side effects of dronedarone include diarrhea and nausea, while flecainide may cause dizziness and vision changes. Dronedarone has significant interactions with medications like Eliquis (apixaban) and requires avoiding grapefruit, whereas flecainide interacts with other antiarrhythmics and requires careful heart monitoring.
