Devulder, Jacques E Could nitric oxide be an important mediator in opioid tolerance and morphine side effects? [electronic resource] - Journal of clinical anesthesia Mar 2002 - 81-2 p. digital Publication Type: Comment; Editorial ISSN: 0952-8180 Standard No.: 10.1016/s0952-8180(01)00359-2 doi Subjects--Topical Terms: Analgesics, Opioid--adverse effectsHumansMorphine--adverse effectsNitric Oxide--physiologyPain--drug therapy