Pediatric Ondansetron Dosing (Zofran)
Pediatric ondansetron dosing depends on indication and route. Common evidence-based regimens include a single weight-based dose for acute gastroenteritis-associated vomiting and weight/age-based regimens for prevention of nausea and vomiting from chemotherapy. [1], [2]
Dosage for Acute Gastroenteritis-Associated Vomiting
Ondansetron is commonly dosed at 0.15 mg/kg PO or sublingual once for acute gastroenteritis-associated vomiting. [1], [2]
- Maximum dose: 8 mg per dose. [1], [2]
Dosage for Chemotherapy-Induced Nausea and Vomiting
Ondansetron dosing for prevention of chemotherapy-induced nausea and vomiting varies by regimen emetogenicity, patient age, and dose timing. [3]
Dosage for Postoperative Nausea and Vomiting
Ondansetron dosing for postoperative nausea and vomiting is supported by product labeling and varies by formulation and clinical setting. [4]
Route and Formulation Notes
Weight-based dosing is typically applied to oral liquid/ODT/sublingual regimens used in acute gastroenteritis algorithms. [1], [2]
Practical Dosing Limits
For acute gastroenteritis-associated vomiting, a single dose regimen uses a 0.15 mg/kg maximum 8 mg limit. [1], [2]
Safety Considerations Related to Pediatric Use
Ondansetron should be avoided or used cautiously in patients with known QT prolongation risk factors, electrolyte abnormalities, or concomitant QT-prolonging medications. [5]