title: A comparison of the stimulus effects of morphine and lysergic acid diethylamide (LSD).
mesh_terms: D000818:Animals; D001285:Atropine / Q000494:pharmacology; D001522:Behavior, Animal / Q000187:drug effects; D003214:Conditioning, Classical / Q000187:drug effects*; D003533:Cyproheptadine / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D008238:Lysergic Acid Diethylamide / Q000494:pharmacology*; D008297:Male; D008784:Methysergide / Q000494:pharmacology; D009020:Morphine / Q000494:pharmacology*; D009270:Naloxone / Q000494:pharmacology; D051381:Rats; D013997:Time Factors
chemical_list: D003533:Cyproheptadine; D009270:Naloxone; D009020:Morphine; D001285:Atropine; D008238:Lysergic Acid Diethylamide; D008784:Methysergide