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Open Dose Calculator →Promethazine
Promethazine
💊 Used for: Nausea, vomiting, allergic reactions, motion sickness
Formulation
Syrup
5mg/5ml
Dose Range
0.5–1 mg/kg
Max Daily
4 mg/kg
Frequency
Every 6 hours as needed
Max Single
25 mg
⚠️ Age Restriction: Not recommended for children under 24 months (2 years) unless specifically prescribed by a doctor.
Route: Oral
Dose by Child Weight
Based on formulation: 5mg/5ml
| Child's Weight | Dose (mg) | Dose (ml) | Max Daily Dose (mg) |
|---|---|---|---|
| 5 kg | 3–5 mg | 2.5–5.0 ml | ≤ 20 mg |
| 6 kg | 3–6 mg | 3.0–6.0 ml | ≤ 24 mg |
| 7 kg | 4–7 mg | 3.5–7.0 ml | ≤ 28 mg |
| 8 kg | 4–8 mg | 4.0–8.0 ml | ≤ 32 mg |
| 9 kg | 5–9 mg | 4.5–9.0 ml | ≤ 36 mg |
| 10 kg | 5–10 mg | 5.0–10.0 ml | ≤ 40 mg |
| 12 kg | 6–12 mg | 6.0–12.0 ml | ≤ 48 mg |
| 15 kg | 8–15 mg | 7.5–15.0 ml | ≤ 60 mg |
| 18 kg | 9–18 mg | 9.0–18.0 ml | ≤ 72 mg |
| 20 kg | 10–20 mg | 10.0–20.0 ml | ≤ 80 mg |
| 25 kg | 13–25 mg | 12.5–25.0 ml | ≤ 100 mg |
| 30 kg | 15–30 mg | 15.0–30.0 ml | ≤ 120 mg |
* Always verify with your doctor. doses are approximate and may vary based on condition and formulation.
⚠️ Important Warnings
- •May cause severe sedation
- •Not for children <2 years due to respiratory depression risk
- •Monitor for paradoxical excitement
Possible Side Effects
- •Pronounced sedation
- •Paradoxical excitement in children
- •Extrapyramidal symptoms
- •Dry mouth, blurred vision
- •Photosensitivity
- •Avoid in children <2 years (respiratory depression risk)
💡 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.