What is an appropriate intravenous dose range for ondansetron in pediatric patients?

What is an appropriate intravenous dose range for ondansetron in pediatric patients?

• A. 0.5-1 mg/kg.
• B. 50-200 mcg/kg.
• C. 0.05-0.1 mg/kg.
• D. 1-2 mg/kg.

Answer: (B)

Dosing in children for ondansetron is weight-based and given as a single IV dose. The standard pediatric regimen is about 0.15 mg/kg per dose, with a practical maximum of around 4 mg per dose. That means a typical pediatric dose falls near 150 micrograms per kilogram, but dosing ranges commonly cited span roughly 50–200 micrograms per kilogram to accommodate different weights while staying within safe single-dose limits. So the range that fits these guidelines is 50–200 mcg/kg, because it includes the usual 0.15 mg/kg (150 mcg/kg) and avoids the extremes. The other options are either too high or too low for a single IV dose in children. Keep in mind QT prolongation risk with ondansetron, so dosing should be used judiciously in patients with QTc concerns.

Dosing in children for ondansetron is weight-based and given as a single IV dose. The standard pediatric regimen is about 0.15 mg/kg per dose, with a practical maximum of around 4 mg per dose. That means a typical pediatric dose falls near 150 micrograms per kilogram, but dosing ranges commonly cited span roughly 50–200 micrograms per kilogram to accommodate different weights while staying within safe single-dose limits.

So the range that fits these guidelines is 50–200 mcg/kg, because it includes the usual 0.15 mg/kg (150 mcg/kg) and avoids the extremes. The other options are either too high or too low for a single IV dose in children. Keep in mind QT prolongation risk with ondansetron, so dosing should be used judiciously in patients with QTc concerns.