title: Effect of naloxone on the "on-off' syndrome in patients receiving long-term levodopa therapy.
mesh_terms: D000368:Aged; D004311:Double-Blind Method; D004359:Drug Therapy, Combination; D005260:Female; D006801:Humans; D007980:Levodopa / Q000627:therapeutic use; D008297:Male; D008875:Middle Aged; D009069:Movement Disorders / Q000188:drug therapy; D009127:Muscle Rigidity / Q000188:drug therapy; D009270:Naloxone / Q000627:therapeutic use*; D010300:Parkinson Disease / Q000188:drug therapy*; D011954:Receptors, Dopamine / Q000187:drug effects
chemical_list: D011954:Receptors, Dopamine; D009270:Naloxone; D007980:Levodopa