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Original ArticleOpen Access
Comparison of Ondansetron and Placebo for Preventing Postoperative Nausea and Emesis in Gastrointestinal Tract Surgery : A Multicenter Randomized Controlled Trial
Kyokong O 
,
Somboonviboon W ,
Visalyaputra S ,
Pausawadi S ,
Saratan P ,
Vongvises P
,
Somboonviboon W ,
Visalyaputra S ,
Pausawadi S ,
Saratan P ,
Vongvises P Background : Nausea and emesis are undesirable events that may cause discomfort and
suffering in the postoperative period. This study was carried out to evaluate the efficacy and safety of
ondansetron for preventing postoperative nausea and vomiting in patients undergoing gastrointestinal
tract surgery.
Methods : Using a randomized double-blind study design, 408 surgical patients (163 male
and 245 female) receiving general endotracheal anesthesia were studied at five medical centers
in Bangkok. Ondansetron (4 mg) or placebo was administered prior to induction of anesthesia.
Episodes of nausea and vomiting, adverse events and laboratory tests (complete blood count and
liver function test) were evaluated during 24 hours after study drug administration.
Results : The incidence of postoperative nausea and vomiting in the placebo group (42.7
and 35.2%) were significantly higher than the ondansetron group (23.9 and 15.4%). However, no
significant differences occurred in the incidence of adverse events or changes in laboratory tests
in the ondansetron group compared to the placebo group.
Conclusions : Ondansetron 4 mg given intravenously before surgery is safe and effective
for preventing postoperative nausea and emesis following gastrointestinal tract surgery.
Key word : Nausea and Emesis, Gastrointestinal Tract Surgery, Ondansetron, Placebo, Comparison, Multicenter Trial
suffering in the postoperative period. This study was carried out to evaluate the efficacy and safety of
ondansetron for preventing postoperative nausea and vomiting in patients undergoing gastrointestinal
tract surgery.
Methods : Using a randomized double-blind study design, 408 surgical patients (163 male
and 245 female) receiving general endotracheal anesthesia were studied at five medical centers
in Bangkok. Ondansetron (4 mg) or placebo was administered prior to induction of anesthesia.
Episodes of nausea and vomiting, adverse events and laboratory tests (complete blood count and
liver function test) were evaluated during 24 hours after study drug administration.
Results : The incidence of postoperative nausea and vomiting in the placebo group (42.7
and 35.2%) were significantly higher than the ondansetron group (23.9 and 15.4%). However, no
significant differences occurred in the incidence of adverse events or changes in laboratory tests
in the ondansetron group compared to the placebo group.
Conclusions : Ondansetron 4 mg given intravenously before surgery is safe and effective
for preventing postoperative nausea and emesis following gastrointestinal tract surgery.
Key word : Nausea and Emesis, Gastrointestinal Tract Surgery, Ondansetron, Placebo, Comparison, Multicenter Trial
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