PREMEDICATION : 50-100 MCG I.M. 30-60 MINUTES BEFORE SURGERY.
ADJUNCT TO GENERAL ANAESTHESIA : LOW DOSES IN MINOR BUT PAINFUL PROCEDURES : 2 MCG / KG IV REPEATED IF NECESSARY. MODERATE DOSES (MAJOR SURGERY) : 2-20 MCG/KG INITIALLY. HIGH DOSES (OPEN HEART OR SIMILAR COMPLEX PROCEDURES ) : 25-50 MCG/KG I.V.
ADJUNCT TO REGIONAL ANAESTHESIA : 501-- MCG IM OR SLOW IV OVER 1-2 MINUTE
POST-OP IN RECOVERY ROOM : 50-100 MCG I.M. CHILDREN (2-12 YEARS) : 2-3 MCG/KG FOR INDUCTION AND MAINTENANCE.
TO AVOID EXCESSIVE DOSAGE IN OBESE PATIENTS DOSE MAY NEED TO BE CALCULATED ON THE BASIS OF IDEAL BODY-WEIGHT
BY SLOW INTRAVENOUS INJECTION, WITH SPONTANEOUS RESPIRATION, 50 - 100 MICROGRAMS (MAX. 200 MICROGRAMS ON SPECIALIST ADVICE), THEN 50 MICROGRAMS AS REQUIRED; CHILD 1 - 5 MICROGRAMS/KG, THEN 1 MICROGRAM/KG AS REQUIRED
WITH ASSISTED VENTILATION, 0.3 - 3.5 MG, THEN 100 - 200 MICROGRAMS AS REQUIRED; CHILD 5 - 10 MICROGRAMS/KG, THEN 1 - 3 MICROGRAMS/KG AS REQUIRED
BY INTRAVENOUS INFUSION, WITH SPONTANEOUS RESPIRATION, ADULT AND CHILD, 50 - 80 NANOGRAMS/KG/MINUTE ADJUSTED ACCORDING TO RESPONSE
WITH ASSISTED VENTILATION, ADULT AND CHILD, INITIALLY 10 MICROGRAMS/KG OVER 10 MINUTES THEN 100 NANOGRAMS/KG/MINUTE ADJUSTED ACCORDING TO RESPONSE; ADULTS MAY REQUIRE UP TO 3 MICROGRAMS/KG/MINUTE IN CARDIAC SURGERY