Allergy to class/drug
Not recommended for ventricular fibrillation or pulseless ventricular tachycardia, as it takes too long to dose
2nd or 3rd atrioventricular block
Severe glycoside intoxication
Prolonged QT segment
Myasthenia gravis
Procainamide
Flecainide
Propafenone
Verapamil
Ibutilide
Lofexidine
Amiodarone
Lidocaine