Abstract
A new thebaine derivative, buprenorphine, 0.6 mg, was compared with morphine 15 mg in a double-blind trial, in patients recovering from elective Caesarean section. Within 1 h of administration analgesia was obtained with both drugs and was sustained for 7-8 h with buprenorphine, and 3-4 h with morphine. Buprenorphine caused a greater decrease in diastolic arterial pressure than did morphine, but arterial systolic pressure and heart rate were not influenced by either drug. No serious side-effects were encountered in this study.
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