Methyldopa or methyldopahydrazine as levodopa synergists.
D002230:Carbidopa / Q000627:therapeutic use; D004295:Dihydroxyphenylalanine / Q000627:therapeutic use*; D004357:Drug Synergism; D006801:Humans; D006834:Hydrazines / Q000627:therapeutic use*; D008750:Methyldopa / Q000627:therapeutic use*; D010300:Parkinson Disease / Q000188:drug therapy
D006834:Hydrazines; D008750:Methyldopa; D004295:Dihydroxyphenylalanine; D002230:Carbidopa