Methenamine

**Definition:** An anti-infective agent most commonly used in the treatment of urinary tract infections. Its anti-infective action derives from the slow release of formaldehyde by hydrolysis at acidic pH. (From Martindale, The Extra Pharmacopoeia, 30th ed, p173)

**Tree numbers:** - D02.092.782.500 - D02.455.426.100.050.392

**Synonyms:** - Hexamethylenetetramine - Hexamine