Tablet
100 mg
Dosage Forms
Uses
Dose and Duration
Acute uncomplicated urinary tract infections
Adult: 100 mg every 12 hours for 7 days
Child >3 months: 3 mg/kg/day every 6 hours for 7 days
Severe recurrent urinary tract infections
Adult: 100 mg every 6 hours for 7 days
If severe nausea occurs, reduce to 200 mg daily in divided doses
Prophylaxis of chronic urinary tract
infections
Adult: 50–100 mg at night
Child >3 months: 1 mg/kg at night (with regular monitoring of lung and liver function)