methenamine /methē″nəmēn/ , a urinary antibacterial drug. ▪ INDICATIONS: It is prescribed in the treatment of urinary tract infections. ▪ CONTRAINDICATIONS: Liver or kidney dysfunction or known hypersensitivity to this drug or to mandelic acid prohibits its use. It should not be used by patients receiving sulfonamides. ▪ ADVERSE EFFECTS: Among the most serious adverse effects are severe GI disturbances and rashes.
