title: Three-choice drug discrimination in the rat: morphine, cyclazocine and saline.
mesh_terms: D000818:Animals; D003496:Cyclazocine / Q000494:pharmacology*; D003913:Dextroamphetamine / Q000494:pharmacology; D004193:Discrimination Learning / Q000187:drug effects; D004192:Discrimination, Psychological / Q000187:drug effects*; D005795:Generalization, Stimulus / Q000187:drug effects; D008297:Male; D009020:Morphine / Q000494:pharmacology*; D009271:Naltrexone / Q000494:pharmacology; D010423:Pentazocine / Q000494:pharmacology; D051381:Rats; D012631:Secobarbital / Q000494:pharmacology; D012965:Sodium Chloride / Q000494:pharmacology*
chemical_list: D012631:Secobarbital; D012965:Sodium Chloride; D009271:Naltrexone; D009020:Morphine; D003496:Cyclazocine; D010423:Pentazocine; D003913:Dextroamphetamine