title: Spinal analgesia: comparison of the mu agonist morphine and the kappa agonist ethylketazocine.
mesh_terms: D000701:Analgesics, Opioid / Q000494:pharmacology*; D000818:Animals; D003496:Cyclazocine / Q000031:analogs & derivatives* / Q000494:pharmacology; D016314:Ethylketocyclazocine; D008297:Male; D009020:Morphine / Q000494:pharmacology*; D051381:Rats; D011930:Reaction Time / Q000187:drug effects; D011957:Receptors, Opioid / Q000187:drug effects; D017473:Receptors, Opioid, kappa; D017450:Receptors, Opioid, mu; D013116:Spinal Cord / Q000187:drug effects*
chemical_list: D000701:Analgesics, Opioid; D011957:Receptors, Opioid; D017473:Receptors, Opioid, kappa; D017450:Receptors, Opioid, mu; D016314:Ethylketocyclazocine; D009020:Morphine; D003496:Cyclazocine