title: Discriminative properties of narcotic antagonists.
mesh_terms: D000818:Animals; D001362:Avoidance Learning / Q000187:drug effects; D004192:Discrimination, Psychological / Q000187:drug effects*; D000882:Haplorhini; D009020:Morphine / Q000494:pharmacology; D009292:Narcotic Antagonists / Q000494:pharmacology*; D051381:Rats
chemical_list: D009292:Narcotic Antagonists; D009020:Morphine