title: Spinal action of narcotic analgesics.
mesh_terms: D000701:Analgesics, Opioid / Q000008:administration & dosage / Q000494:pharmacology*; D000768:Anesthesia, General; D000775:Anesthesia, Spinal; D000818:Animals; D002415:Cats; D004305:Dose-Response Relationship, Drug; D006801:Humans; D007278:Injections, Spinal; D007478:Iontophoresis; D009020:Morphine / Q000008:administration & dosage / Q000494:pharmacology; D009270:Naloxone / Q000494:pharmacology; D009474:Neurons / Q000187:drug effects; D011817:Rabbits; D051381:Rats; D013116:Spinal Cord / Q000187:drug effects*
chemical_list: D000701:Analgesics, Opioid; D009270:Naloxone; D009020:Morphine