title: Intrathecal delta-receptor ligand produces analgesia in man.
mesh_terms: D000368:Aged; D000698:Analgesia; D000818:Animals; D002415:Cats; D004743:Enkephalin, Leucine / Q000031:analogs & derivatives / Q000494:pharmacology; D016308:Enkephalin, Leucine-2-Alanine; D006801:Humans; D007278:Injections, Spinal; D008297:Male; D009020:Morphine / Q000494:pharmacology; D010148:Intractable Pain / Q000188:drug therapy*; D051381:Rats; D011957:Receptors, Opioid / Q000187:drug effects*; D017465:Receptors, Opioid, delta
chemical_list: D011957:Receptors, Opioid; D017465:Receptors, Opioid, delta; D004743:Enkephalin, Leucine; D016308:Enkephalin, Leucine-2-Alanine; D009020:Morphine