title: Black vomit after levodopa.
mesh_terms: D000136:Acid-Base Equilibrium; D004295:Dihydroxyphenylalanine / Q000009:adverse effects* / Q000378:metabolism; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008297:Male; D008875:Middle Aged; D014839:Vomiting / Q000139:chemically induced / Q000150:complications / Q000378:metabolism
chemical_list: D004295:Dihydroxyphenylalanine