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Open Dose Calculator →Isoniazid (INH)
Isoniazid (INH)
💊 Used for: Tuberculosis (first line); prophylaxis
Formulation
Tablet
Standard tablet
Dose Range
7–14 mg/kg
Max Daily
14 mg/kg
Frequency
As directed
Max Single
300 mg
Route: oral
Dose by Child Weight
Based on formulation: Standard tablet
| Child's Weight | Dose (mg) | Dose (ml) | Max Daily Dose (mg) |
|---|---|---|---|
| 5 kg | 35–70 mg | 35.0–70.0 ml | ≤ 70 mg |
| 6 kg | 42–84 mg | 42.0–84.0 ml | ≤ 84 mg |
| 7 kg | 49–98 mg | 49.0–98.0 ml | ≤ 98 mg |
| 8 kg | 56–112 mg | 56.0–112.0 ml | ≤ 112 mg |
| 9 kg | 63–126 mg | 63.0–126.0 ml | ≤ 126 mg |
| 10 kg | 70–140 mg | 70.0–140.0 ml | ≤ 140 mg |
| 12 kg | 84–168 mg | 84.0–168.0 ml | ≤ 168 mg |
| 15 kg | 105–210 mg | 105.0–210.0 ml | ≤ 210 mg |
| 18 kg | 126–252 mg | 126.0–252.0 ml | ≤ 252 mg |
| 20 kg | 140–280 mg | 140.0–280.0 ml | ≤ 280 mg |
| 25 kg | 175–350 mg | 175.0–350.0 ml | ≤ 350 mg |
| 30 kg | 210–420 mg | 210.0–420.0 ml | ≤ 420 mg |
* Always verify with your doctor. doses are approximate and may vary based on condition and formulation.
⚠️ Important Warnings
- •Hepatotoxicity; peripheral neuropathy (pyridoxine deficiency) - give B6; lupus
💡 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.