• W M Splinter, E J Rhine, D W Roberts, M R Baxter, H M Gould, L E Hall, and H B MacNeill.
• Department of Anaesthesia, Children's Hospital of Eastern Ontario, University of Ottawa, Canada.
• Can J Anaesth. 1995 Oct 1;42(10):848-51.

AbstractBoth intravenous ondansetron (OND) and droperidol (DROP) have been observed to reduce vomiting after tonsillectomy in children. This randomized, double-blind investigation compared the effect of OND and DROP on vomiting after outpatient tonsillectomy in 276 healthy children age 2-12 yr. All subjects received a standardized anaesthetic, which consisted of induction with either propofol or halothane/N2O, vecuronium 0.1 mg x kg(-1) on an as needed basis, maintenance with halothane/N2O, midazolam and codeine, and reversal of neuromuscular blockade with neostigmine and atropine on an as needed basis. Subjects were given either OND 150 micrograms x kg(-1) or DROP 50 micrograms x kg(-1)iv after induction of anaesthesia. Rescue antiemetics in the hospital were administered to patients who vomited X 2 and X 4, respectively. Postoperative pain was treated with morphine, codeine and/or acetaminophen. For 24 hr following surgery, emesis was recorded by nursing staff while subjects were in the hospital, and by parents following discharge from hospital. The two groups were similar with respect to demographic data, induction technique and anaesthesia time. The frequency of in-hospital emesis was 16% in the OND-patients and 30% in the DROP-group, P <0.05. The OND-subjects required fewer rescue antiemetics, 5% vs 13%, P <0.05. The overall incidence of emesis was 45% in the OND-group and 57% in the DROP-group, P <0.05. In conclusion, ondansetron was a superior prophylactic antiemetic for tonsillectomy in children when compared to droperidol.

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