title: Pain modulation by 5-hydroxytryptaminergic agents and morphine as measured by three pain tests.
mesh_terms: D000818:Animals; D004305:Dose-Response Relationship, Drug; D010134:Fenclonine / Q000494:pharmacology; D008297:Male; D008784:Methysergide / Q000494:pharmacology; D009020:Morphine / Q000494:pharmacology*; D009270:Naloxone / Q000494:pharmacology; D009619:Nociceptors / Q000187:drug effects*; D051381:Rats; D012701:Serotonin / Q000502:physiology*; D014364:Tryptophan / Q000494:pharmacology
chemical_list: D012701:Serotonin; D009270:Naloxone; D009020:Morphine; D014364:Tryptophan; D010134:Fenclonine; D008784:Methysergide