title: Phenazopyridine-induced sulfhemoglobinemia: inadvertent rechallenge.
authors.forename: S M
authors.initials: SM
authors.lastname: Halvorsen
authors.forename: W L
authors.initials: WL
authors.lastname: Dull
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D008706:Methemoglobin / Q000032:analysis; D010621:Phenazopyridine / Q000009:adverse effects*; D013436:Sulfhemoglobinemia / Q000139:chemically induced*
chemical_list: D008706:Methemoglobin; D010621:Phenazopyridine