We performed a double-blind controlled trial to compare the analgesic
effect of two nonsteroidal anti-inflammatory drugs. We compared rectal
diclofenac 100 mg given 1 h before induction of anaesthesia with intr
avenous ketorolac 10 mg given immediately before anaesthesia in 40 pat
ients undergoing arthroscopy, of the knee as day cases. A visual analo
gue scale was used to assess pain pr iol to discharge. Pain, analgesic
consumption, sleep disturbance and restriction of activities were rec
orded by telephone enquiry 24 h after surgery. There was no difference
in the pain parameters, sleep disturbance, or restriction of activity
between groups. We suggest that ketorolac 10 mg intravenously and dic
lofenac 100 mg rectally provide comparable postoperative analgesia in
the first 24 h after arthroscopy of the knee.