title: Progress in the potential use of enkephalin analogs.
mesh_terms: D000700:Analgesics; D002986:Clinical Trials as Topic; D004341:Drug Evaluation; D004745:Enkephalins / Q000378:metabolism / Q000627:therapeutic use*; D006801:Humans; D007700:Kinetics; D011957:Receptors, Opioid / Q000502:physiology; D017465:Receptors, Opioid, delta; D017450:Receptors, Opioid, mu; D013329:Structure-Activity Relationship
chemical_list: D000700:Analgesics; D004745:Enkephalins; D011957:Receptors, Opioid; D017465:Receptors, Opioid, delta; D017450:Receptors, Opioid, mu