If you have atrial fibrillation, a common heart rhythm disorder, your doctor may prescribe anti-arrhythmic medications to help prevent future episodes of atrial fibrillation. Medications may include:

  • Dofetilide (Tikosyn)
  • Flecainide
  • Propafenone (Rythmol)
  • Amiodarone (Cordarone, Pacerone)

Although these drugs may help maintain a normal heart rhythm, they can cause side effects, including:

  • Nausea
  • Dizziness
  • Fatigue

Rarely, they may cause ventricular arrhythmias — life-threatening rhythm disturbances originating in the heart's lower chambers. These medications may be needed indefinitely. Even with medications, the chance of another episode of atrial fibrillation is high.

Apr. 26, 2014