L-dopa and vitamin B 6 .
D055598:Chemical Phenomena; D002621:Chemistry; D004295:Dihydroxyphenylalanine / Q000627:therapeutic use; D006801:Humans; D010300:Parkinson Disease / Q000188:drug therapy; D011736:Pyridoxine / Q000627:therapeutic use
D004295:Dihydroxyphenylalanine; D011736:Pyridoxine