title: Conditioning effects of narcotics in humans.
mesh_terms: D003213:Conditioning, Psychological / Q000187:drug effects*; D003496:Cyclazocine / Q000494:pharmacology; D004361:Drug Tolerance; D006801:Humans; D009271:Naltrexone / Q000494:pharmacology; D009294:Narcotics / Q000494:pharmacology*; D013375:Substance Withdrawal Syndrome / Q000503:physiopathology
chemical_list: D009294:Narcotics; D009271:Naltrexone; D003496:Cyclazocine