title: Lack of tolerance to the depression of raphe unit activity by lysergic acid diethylamide.
mesh_terms: D000818:Animals; D001923:Brain Chemistry / Q000187:drug effects; D001933:Brain Stem / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D004361:Drug Tolerance; D008238:Lysergic Acid Diethylamide / Q000494:pharmacology*; D008297:Male; D009433:Neural Inhibition / Q000187:drug effects; D009474:Neurons / Q000187:drug effects*; D011903:Raphe Nuclei / Q000187:drug effects*; D051381:Rats; D012701:Serotonin / Q000378:metabolism
chemical_list: D012701:Serotonin; D008238:Lysergic Acid Diethylamide