Generic name: methenamine [ meh-THEH-na-meen ]
Brand names: Hiprex, Mandelamine, Urex
Dosage form: oral tablet (hippurate 1 g; mandelate 0.5 g; mandelate 1 g)
Drug class:Urinary anti-infectives
What is methenamine?
Methenamine is an antibacterial medicine used to treat or prevent bladder infections in adults and children at least 6 years old.
Methenamine may also be used for purposes not listed in this medication guide.
Warnings
Use only as directed. Tell your doctor if you use other medicines or have other medical conditions or allergies.
Before taking this medicine
You should not use methenamine if you are allergic to it, or if you have:
kidney disease;
severe liver disease; or
if you are dehydrated.
Ask a doctor or pharmacist if methenamine is safe to use if you've ever had liver problems.
Ask a doctor before using this medicine if you are pregnant.
Do not breastfeed.
How should I take methenamine?
Use exactly as directed on the label, or as prescribed by your doctor.
Methenamine works best when your urine has a low pH and is acidic. You can measure your pH levels at home using urine test strips purchased from a pharmacy. Your doctor may occasionally test your urine to make sure an infection has cleared.
Learn about the foods to eat or avoid to help keep your urine acidic. Your doctor may also prescribe other medicines. Drink plenty of liquids.
Follow your doctor's diet and medi...
