title: Roles of serotonin and gamma-aminobutyric acid in opioid effects.
mesh_terms: D000698:Analgesia; D000700:Analgesics / Q000494:pharmacology; D001833:Body Temperature Regulation / Q000187:drug effects; D004361:Drug Tolerance; D004558:Electric Stimulation; D006801:Humans; D007858:Learning / Q000187:drug effects; D009043:Motor Activity / Q000187:drug effects; D009130:Muscle, Smooth / Q000187:drug effects; D009294:Narcotics / Q000494:pharmacology*; D009619:Nociceptors / Q000187:drug effects; D012701:Serotonin / Q000378:metabolism / Q000502:physiology*; D019966:Substance-Related Disorders / Q000503:physiopathology; D005680:gamma-Aminobutyric Acid / Q000502:physiology*
chemical_list: D000700:Analgesics; D009294:Narcotics; D012701:Serotonin; D005680:gamma-Aminobutyric Acid