British Journal of Anaesthesia, Vol 77, Issue 4 445-447, Copyright © 1996 by The Board of Management and Trustees of the British Journal of Anaesthesia
J. E. Montgomery, C. J. Sutherland, I. G. Kestin and J. R. Sneyd
Paracetamol and diclofenac have different mechanisms of action, and the
combination may be more effective than each drug used alone in treating
postoperative pain. In a double-blind, controlled design, we studied 60
patients undergoing elective abdominal gynaecological surgery, who received
suppositories of paracetamol 1.5 g, diclofenac 100 mg or a combination of
the two before the start of surgery. Patients received morphine in the
intraoperative period, and cumulative morphine use from a
patient-controlled analgesia system was recorded to measure the analgesic
effect of the suppositories. Morphine consumption was greatest in the group
that received paracetamol alone and lowest in the group given the
combination (P < 0.01). There was no difference in the incidence of
morphine-related side effects between the groups. We conclude that a
diclofenac-paracetamol combination reduced the amount of morphine used
compared with paracetamol alone.
CLINICAL INVESTIGATIONS
Morphine consumption in patients receiving rectal paracetamol and diclofenac alone and in combination
Department of Anaesthesia, Derriford Hospital, Derriford Road, Plymouth, Plymouth PL6 8DH
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