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Ondansetron
💊 Used for: Nausea, vomiting
Formulation
Syrup
2mg/5ml
Dose Range
0.1–0.15 mg/kg
Max Daily
0.6 mg/kg
Frequency
Every 8 hours as needed
Max Single
8 mg
Route: Oral
Dose by Child Weight
Based on formulation: 2mg/5ml
| Child's Weight | Dose (mg) | Dose (ml) | Max Daily Dose (mg) |
|---|---|---|---|
| 5 kg | 1–1 mg | 1.3–1.9 ml | ≤ 3 mg |
| 6 kg | 1–1 mg | 1.5–2.2 ml | ≤ 4 mg |
| 7 kg | 1–1 mg | 1.8–2.6 ml | ≤ 4 mg |
| 8 kg | 1–1 mg | 2.0–3.0 ml | ≤ 5 mg |
| 9 kg | 1–1 mg | 2.3–3.4 ml | ≤ 5 mg |
| 10 kg | 1–2 mg | 2.5–3.8 ml | ≤ 6 mg |
| 12 kg | 1–2 mg | 3.0–4.5 ml | ≤ 7 mg |
| 15 kg | 2–2 mg | 3.8–5.6 ml | ≤ 9 mg |
| 18 kg | 2–3 mg | 4.5–6.7 ml | ≤ 11 mg |
| 20 kg | 2–3 mg | 5.0–7.5 ml | ≤ 12 mg |
| 25 kg | 3–4 mg | 6.3–9.4 ml | ≤ 15 mg |
| 30 kg | 3–5 mg | 7.5–11.3 ml | ≤ 18 mg |
* Always verify with your doctor. doses are approximate and may vary based on condition and formulation.
⚠️ Important Warnings
- •Monitor for QT prolongation
- •May cause headache
- •Avoid in patients with pheochromocytoma
Possible Side Effects
- •Headache, fatigue
- •Constipation
- •QT prolongation (cardiac risk)
- •Dizziness
- •Rare: serotonin syndrome
- •Injection site reactions
💡 Use the DoseCare Calculator for interactive dose calculations tailored to your child's exact weight and formulation.
DoseCare is a decision support tool only. Always verify doses with a qualified healthcare provider.