ADULTS :- 4 MG 4-6 HOURS DAILY. MAX. 24 MG DAILY. CHILDREN :- 2 MG 4-6 HOURS DAILY, MAX. 12 MG DAILY. IT SHOULD BE GIVEN I.M. , SUBCUTANEOUS, OR SLOW I.V. INJECTION. THE USUAL DOSE :- 10 TO 20 MG IN 24 HOURS NOT TO EXCEED 40 MG DAILY. CHILDREN :- 87.5 MCG/KG/BODY WT 4 TIMES DAILY.