Methenamine, available under the brand names Hiprex and Urex, is a prescription medication used to prevent or treat chronic urinary tract infections (UTIs). It belongs to the drug class known as antibacterial agents. Methenamine releases formaldehyde in the urine, inhibiting cell division, and damaging bacterial cells' protein. This action eliminates the bacteria that can lead to infection.
This medication is available in brand-name and generic versions, requiring a prescription from a licensed healthcare provider.