title: Darkening of urine from patients treated with L-dopa.
mesh_terms: D003116:Color; D004295:Dihydroxyphenylalanine / Q000008:administration & dosage / Q000378:metabolism / Q000652:urine*; D006801:Humans; D013997:Time Factors
chemical_list: D004295:Dihydroxyphenylalanine