Hypersensitivity to methenamine mandelate.
D000368:Aged; D004342:Drug Hypersensitivity / Q000209:etiology*; D006801:Humans; D006969:Hypersensitivity, Immediate / Q000209:etiology*; D008297:Male; D008709:Methenamine / Q000009:adverse effects*; D014552:Urinary Tract Infections / Q000188:drug therapy
D008709:Methenamine