<unk>  (N-acetylprocainamide, NAPA) is an antiarrhythmic drug. Chemically, it is the N-acetylated metabolite of procainamide. It is a Class III antiarrhythmic agent, whereas procainamide is a Class Ia antiarrhythmic drug. It is only partially as active as procainamide; when checking levels, both must be included in the final calculation.
Acecainide
Tocainide
Flecainide
Procainamide
Verapamil
Ibutilide
Dofetilide
Amiodarone