title: Morphine analgesia after intrathecal administration of a narcotic agonist, chloroxymorphamine and antagonist, chlornaltrexamine.
mesh_terms: D000700:Analgesics; D000818:Animals; D004305:Dose-Response Relationship, Drug; D004347:Drug Interactions; D004091:Hydromorphone / Q000031:analogs & derivatives*; D007278:Injections, Spinal; D008297:Male; D009020:Morphine / Q000494:pharmacology*; D009270:Naloxone / Q000031:analogs & derivatives*; D009271:Naltrexone / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000494:pharmacology; D009292:Narcotic Antagonists / Q000008:administration & dosage / Q000494:pharmacology*; D009294:Narcotics / Q000008:administration & dosage / Q000494:pharmacology*; D009588:Nitrogen Mustard Compounds / Q000008:administration & dosage / Q000494:pharmacology*; D010111:Oxymorphone / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000494:pharmacology; D051381:Rats
chemical_list: D000700:Analgesics; D009292:Narcotic Antagonists; D009294:Narcotics; D009588:Nitrogen Mustard Compounds; D009270:Naloxone; D009271:Naltrexone; C017120:chlornaltrexamine; C019299:chloroxymorphamine; D009020:Morphine; D010111:Oxymorphone; D004091:Hydromorphone