Tikosyn (generic: dofetilide) is a prescription medication used to treat adults with irregular heartbeat, known medically as atrial fibrillation or atrial flutter. Tikosyn belongs to a group of drugs called antiarrhythmic agents, which help restore regular heart rhythm.

This medication comes in capsule form and is taken twice a day, with or without food.

Some of the common side effects of Tikosyn include headache, chest pain, and dizziness.