• F J Pueyo, F Carrascosa, L Lopez, M J Iribarren, F García-Pedrajas, and A Saez.
• Department of Anesthesiology and Critical Care, University Clinic, School of Medicine, University of Navarra, Pamplona, Spain.
• Anesth. Analg. 1996 Jul 1;83(1):117-22.

AbstractThe aim of this study was to compare the efficacy and safety of ondansetron plus droperidol with each drug alone or placebo in the prevention of postoperative nausea and vomiting (PONV). One hundred females, aged 18-65 yr, ASA physical status I-II, undergoing general anesthesia for elective abdominal surgery were included in a prospective, double-blind, placebo-controlled, randomized study. A standardized anesthetic technique and postoperative analgesia (ketorolac plus patient-controlled analgesia [PCA] with morphine) were used in all patients. Patients were randomly assigned to receive placebo (Group 1, n = 25), droperidol 2.5 mg with induction of anesthesia and 1.25 mg 12 h later (Group 2, n = 25), ondansetron 4 mg with induction (Group 3, n = 25), and ondansetron plus droperidol at the same doses as Groups 3 and 2, respectively (Group 4, n = 25). A complete response, defined as no PONV in 48 h, occurred in 28% of patients in Group 1, 60% in Group 2 (P < 0.05 vs Group 1), 56% in Group 3 (P < 0.05 vs Group 1), and 92% in Group 4 (P < 0.01 vs Groups 1, 2, and 3). Sedation was significantly greater with droperidol (Groups 2 and 4) for 12 h postoperatively. In conclusion, the combination of ondansetron plus droperidol was more effective than each antiemetic alone or placebo in the prevention of PONV in women undergoing elective abdominal surgery.

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