Melatonin: pituitary action and naloxone reversed analgesia.
D000700:Analgesics; D000818:Animals; D002645:Chickens; D004305:Dose-Response Relationship, Drug; D004347:Drug Interactions; D007649:Ketamine / Q000494:pharmacology; D008027:Light; D008297:Male; D008550:Melatonin / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D009270:Naloxone / Q000494:pharmacology*; D010902:Pituitary Gland / Q000187:drug effects*; D011930:Reaction Time / Q000187:drug effects
D000700:Analgesics; D009270:Naloxone; D007649:Ketamine; D008550:Melatonin