(III Potassium) Amiodarone has Class III mostly, but also I, II, & IV activity
(Ia Moderate) Quinidine, Ajmaline, Procainamide, Disopyramide
(Ib Weak) Lidocaine, Phenytoin, Mexiletine, Tocainide
(Ic Strong) Encainide, Flecainide, Propafenone, Moricizine
(II Beta Blocker) Carvedilol, Esmolol, Timolol, Metoprolol, Atenolol, Bisoprolol, Nebivolol
(II Beta Blocker) Propranolol also shows some class I action
(III) Ibutilide, Dofetilide, Dronedarone, Vernakalant
(III) Sotalol is also a beta blocker
(IV Calcium Channel Blocker) Verapamil, Diltiazem
(V) Adenosine, Digoxin, Magnesium sulfate