All of the following are class Ic anti-arrhythmic drugs except?: (A) Propafenone, (B) Tocainide, (C) Enacainide, (D) Flecainide
Answer is B. CLASS I ANTI-ARRHYTHMICS Class Mechanism Drugs Ia Na+ and K+ channel blocker Quinidine Procainamide Ib Na+ channel blocker K+ channel opener Lignocaine Phenytoin Tocainide Ic Na+ Channel blocker Enacainide Flecainide Propafenone Tocainide: Class Ib anti-arrhythmic.