title: Methemoglobinemia caused by acute overdosage of phenazopyridine.
mesh_terms: D000328:Adult; D006801:Humans; D008297:Male; D008708:Methemoglobinemia / Q000139:chemically induced*; D010621:Phenazopyridine / Q000008:administration & dosage / Q000009:adverse effects*; D011725:Pyridines / Q000009:adverse effects*; D019966:Substance-Related Disorders / Q000150:complications*
chemical_list: D011725:Pyridines; D010621:Phenazopyridine