Heart block, sinus node dysfunction
Torsades de pointes, ventricular tachycardia, ventricular fibrillation
Cardiac shock, cardiac arrest
New onset or worsening heart failure
Dizziness, fatigue, blurred vision
Nausea
Dyspnea
Flecainide
Procainamide
Amiodarone
Ibutilide
Verapamil
Propafenone
Sotalol
Encainide