Acute gastroenteritis is a major cause of morbidity in the US, estimated to account for >1.5 million outpatient visits and 200,000 hospitalizations.¹ Oral rehydration therapy (ORT) had previously been recommended by the American Academy of Pediatrics (AAP) and World Health Organization (WHO) as first-line therapy for children with mild-to-moderate dehydration. However, many pediatric emergency department (ED) providers were using IV rehydration due to perceived ease, the presence of vomiting, resources involved in administering ORT, and presumed parental expectations.² This study aimed to evaluate the effectiveness of ORT as compared to IV rehydration in pediatric patients presenting to the ED with gastroenteritis and moderate dehydration.