VENTRICULAR FIBRILLATION :- 5 MG/KG/ BODY WT AS AN UNDILUTED 5% (50 MG PER ML) BY RAPID I.V INJECTION, REPEATED 10 MG/KG. TOTAL DOSE IS :- 30 MG/KG. VENTRICULAR ARRHYTHMIAS :- 5 TO 10 MG/KG BY EITHER ROUTE, REPEATED EVERY 1 TO 2 HOURS TILL ARRHYTHMIA IS CONTROLLED & SUBSEQUENTLY EVERY 6 HRLY I.V. ^ HRLY OR 6-8 HRLY BY I.M. FOR MAINTENENCE.