Nitrofurantoin — paediatric dose

1.5 mg/kg 6H (UTI); 1 mg/kg nocte prophylaxis. That is 1.5 mg/kg per dose.

The maximum single dose is 100 mg. Weight-based calculation should never exceed this ceiling.

Nitrofurantoin is given by PO, 6H.

Weight-based dosing for Nitrofurantoin in children. Category: Antibiotic.

Dose	1.5 mg/kg 6H (UTI); 1 mg/kg nocte prophylaxis
Per kg	1.5 mg/kg
Maximum	100 mg
Route	PO
Frequency	6H

Clinical notes

Avoid <3 months and in significant renal impairment.

1.5 mg/kg 6H (UTI); 1 mg/kg nocte prophylaxis. That is 1.5 mg/kg per dose.

The maximum single dose is 100 mg. Weight-based calculation should never exceed this ceiling.

Nitrofurantoin is given by PO, 6H.

Reviewed by Dr Santanu Ghosh — MBBS, MD Paediatrics (Army), IDPCCM (IAP, ICH Kolkata). Paediatrician and paediatric critical care specialist.

Compiled from standard paediatric references. Verify against a current formulary and your local protocol.

Spotted something wrong? Report an error on this page — corrections from clinicians are welcome and are reviewed before any change is published.

Last reviewed 2026-08-12.