developed countries Evid Based Child Health 2013;8:1123–1137 Sturm JR, Hirsh DA, Schweickert A, et al Ondansetron use in the pediatric emergency department and effects on hospitalization and return rates: are we missing alternative diagnoses? Ann Emerg Med 2010;55:415–422 Tomasik E, Ziotkowska E, Kotodziej M, et al Systematic review with metaanalysis Ondansetron for vomiting in children with acute gastroenteritis Aliment Pharmacol Ther 2016;44:438–446