comparison between preoperative rectal diclofenac plus paracetamol and diclofenac alone for postoperativepain of hysterectomy.

objective: to detect whether the preoperative combined administration of rectal diclofenac and paracetamol is superior to placebo or rectal diclofenac alone for pain after abdominal hysterectomy. materials and methods: ninety female patients (american society of anesthesiologists (asa) physical status i-ii), scheduled for abdominal hysterectomy were recruited to this double blind trial and were randomized to receive one of three modalities before surgery: rectal combination of diclofenac and paracetamol, rectal diclofenac alone or rectal placebo alone which were given as a suppository one hour prior to surgery. the primary outcomes were visual analogue pain scores measured at 0, 0.5, 2, 4, 8, 16 and 24 hours after surgery and the time of first administration and also total amount of morphine used in the first 24 hour after surgery. a 10 cm visual analog scale (vas ) was used to assess pain intensity at rest. results: in patients receiving the combination of diclofenac and paracetamol total dose of morphine used in the first 24 hour after surgery was significantly lower (13.9 ± 2.7 mg) compared to diclofenac group (16.8± 2.8 mg) and placebo group (20.1 ± 3.6 mg) (p < 0.05). vas pain score was significantly lower in combination group compared to other groups all time during first 24 hours (p < 0.05). there had been a significant difference between combination group and the two other groups in terms of the first request of morphine (p < 0.05). conclusion: according to our study patients who receive the rectal diclofenac-paracetamol combination experience significantly a lower pain scale in the first 24 hour after surgery compared with patients receiving diclofenac or placebo alone. their need to supplementary analgesic is significantly later and lower compared to placebo and diclofenac alone.