Comparition the analgesic effects of intravenous naproksen sodyum+codein with that of paracetamol+codein on postoperative pain and contramal consumption during the first 24 hour after a lumbar disk surgery.

Patients were treated using patient-controlled analgesia with contramal for 24 hours after a lumbar disk surgery and randomized to receive IV naproksen sodium+codein, paracetamol+codein or isotonic saline (placebo).

The primary endpoint was pain intensity measured by the visual analogue scale, and secondary endpoints were contramal consumption and related side effects.

Inclusion Criteria:

• American Society of Anesthesiologists 1 or 2 status patients scheduled for elective lumbar disk surgery under general anesthesia

Exclusion Criteria:

• Patients, known allergies to any of the drugs used in this study
• eptic ulcer disease, hepatic and renal dysfunction, emergency surgery, or inability to provide informed consent (eg, mental disorders)