Skip to main content

Methenamine Dosage

Medically reviewed by Drugs.com. Last updated on May 23, 2023.

Applies to the following strengths: mandelate 1 g; hippurate 1 g; mandelate 0.5 g; mandelate 0.5 g/5 mL; mandelate; hippurate

Usual Adult Dose for Cystitis

Hippurate: 1 g orally twice a day (morning and night)
Mandelate: 1 g orally 4 times a day (after each meal and at bedtime)

Uses:

Usual Adult Dose for Cystitis Prophylaxis

Hippurate: 1 g orally twice a day (morning and night)
Mandelate: 1 g orally 4 times a day (after each meal and at bedtime)

Uses:

Usual Adult Dose for Pyelonephritis

Hippurate: 1 g orally twice a day (morning and night)
Mandelate: 1 g orally 4 times a day (after each meal and at bedtime)

Uses:

Usual Adult Dose for Urinary Tract Infection

Hippurate: 1 g orally twice a day (morning and night)
Mandelate: 1 g orally 4 times a day (after each meal and at bedtime)

Uses:

Usual Pediatric Dose for Cystitis

Hippurate:
6 to 12 years: 0.5 to 1 g orally twice a day (morning and night)
13 years or older: 1 g orally twice a day (morning and night)

Mandelate:
6 to 12 years: 0.5 g orally 4 times a day (after each meal and at bedtime)
13 years or older: 1 g orally 4 times a day (after each meal and at bedtime)

Uses:

Usual Pediatric Dose for Cystitis Prophylaxis

Hippurate:
6 to 12 years: 0.5 to 1 g orally twice a day (morning and night)
13 years or older: 1 g orally twice a day (morning and night)

Mandelate:
6 to 12 years: 0.5 g orally 4 times a day (after each meal and at bedtime)
13 years or older: 1 g orally 4 times a day (after each meal and at bedtime)

Uses:

Usual Pediatric Dose for Pyelonephritis

Hippurate:
6 to 12 years: 0.5 to 1 g orally twice a day (morning and night)
13 years or older: 1 g orally twice a day (morning and night)

Mandelate:
6 to 12 years: 0.5 g orally 4 times a day (after each meal and at bedtime)
13 years or older: 1 g orally 4 times a day (after each meal and at bedtime)

Uses:

Usual Pediatric Dose for Urinary Tract Infection

Hippurate:
6 to 12 years: 0.5 to 1 g orally twice a day (morning and night)
13 years or older: 1 g orally twice a day (morning and night)

Mandelate:
6 to 12 years: 0.5 g orally 4 times a day (after each meal and at bedtime)
13 years or older: 1 g orally 4 times a day (after each meal and at bedtime)

Uses:

Renal Dose Adjustments

Renal dysfunction: Contraindicated

Liver Dose Adjustments

Severe liver dysfunction: Contraindicated

Precautions

Safety and efficacy have not been established in patients younger than 6 years.

Consult WARNINGS section for additional precautions.

Dialysis

Renal dysfunction: Contraindicated

Other Comments

Administration advice:


Storage requirements:

General:

Monitoring:

Patient advice:

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.