Source:http://linkedlifedata.com/resource/umls/id/C0027355
MSH: A narcotic antagonist with some agonist properties. It is an antagonist at mu opioid receptors and an agonist at kappa opioid receptors. Given alone it produces a broad spectrum of unpleasant effects and it is considered to be clinically obsolete.,CSP: narcotic antagonist with some agonist properties; an antagonist at mu opioid receptors and an agonist at kappa opioid receptors.