title: Phenazopyridine-induced hemolytic anemia.
abstract: An elderly man was seen with hemolytic anemia due to the urinary tract analgesic, phenazopyridine hydrochloride. The mechanisms underlying this toxic reaction are presented. Cautious use of this drug in elderly patients and in those with renal insufficiency is emphasized.
mesh_terms: D000368:Aged; D000631:Aminopyridines / Q000009:adverse effects*; D000743:Anemia, Hemolytic / Q000139:chemically induced*; D004305:Dose-Response Relationship, Drug; D006801:Humans; D008297:Male; D010621:Phenazopyridine / Q000008:administration & dosage / Q000009:adverse effects*; D001745:Urinary Bladder Diseases / Q000188:drug therapy
chemical_list: D000631:Aminopyridines; D010621:Phenazopyridine