Isoniazid (INH) Dose for Children

Isoniazid (INH)oral

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Isoniazid (INH)

Isoniazid (INH)

💊 Used for: Tuberculosis (first line); prophylaxis

Formulation

Tablet

Standard tablet

Dose Range

714 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 WeightDose (mg)Dose (ml)Max Daily Dose (mg)
5 kg3570 mg35.070.0 ml≤ 70 mg
6 kg4284 mg42.084.0 ml≤ 84 mg
7 kg4998 mg49.098.0 ml≤ 98 mg
8 kg56112 mg56.0112.0 ml≤ 112 mg
9 kg63126 mg63.0126.0 ml≤ 126 mg
10 kg70140 mg70.0140.0 ml≤ 140 mg
12 kg84168 mg84.0168.0 ml≤ 168 mg
15 kg105210 mg105.0210.0 ml≤ 210 mg
18 kg126252 mg126.0252.0 ml≤ 252 mg
20 kg140280 mg140.0280.0 ml≤ 280 mg
25 kg175350 mg175.0350.0 ml≤ 350 mg
30 kg210420 mg210.0420.0 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.

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