Anti arrythmic drugs classification

Anti arrhythmic drugs are classified into four main classes.

Class I – Sodium channel blockers(act on Phase 0)

Class II – Beta blockers(act on phase 4)

Class III- Potassium channel blockers(act on phase 3)

Class IV – Calcium channel blockers(act on phase 2)

Class I- Na+ channel blockers

Class IA – Quinidine, Procainamide, Disopyramide

Class IB -Lidocaine,Phenytoin,Mexiletine,Tocainide

Class IC -Flecainide,Encainide,Propafenone,Morocizine

Class II -Beta blockers

Propranlol,Acebutolol,Esmolol

Class III- K+ Blockers

Amioderone,Bretylium,Ibutilide,Dofetilide,Sotalol

Class IV – Ca2+ blockers

Verapamil,Diltiazem

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