title: Nalorphine-induced changes in morphine self-administration in rhesus monkeys.
mesh_terms: D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects*; D003216:Conditioning, Operant / Q000187:drug effects*; D004357:Drug Synergism; D005260:Female; D000882:Haplorhini; D006801:Humans; D008297:Male; D009019:Morphinans / Q000494:pharmacology; D009020:Morphine / Q000494:pharmacology*; D009021:Morphine Dependence; D009269:Nalorphine / Q000008:administration & dosage / Q000494:pharmacology*; D012054:Reinforcement, Psychology
chemical_list: D009019:Morphinans; D009020:Morphine; D009269:Nalorphine