Usual Adult Dose for Cystitis:
Regular release: 50 to 100 mg orally 4 times a day for 1 week or for at least 3 days after urine sterility is obtained
Dual release: 100 mg orally twice a day for 7 days
Usual Adult Dose for Cystitis Prophylaxis:
Regular release: 50 to 100 mg orally once a day at bedtime
Usual Pediatric Dose for Cystitis:
Regular release:
1 month or older: 5 to 7 mg/kg/day (up to 400 mg/day) orally in 4 divided doses
Dual release:
Greater than 12 years: 100 mg orally twice a day for 7 days
Usual Pediatric Dose for Cystitis Prophylaxis:
Regular release:
1 month or older: 1 to 2 mg/kg/day (up to 100 mg/day) orally in 1 to 2 divided doses
 Detailed Nitrofurantoin dosage information
