- BACKGROUND:Asunspecificantagonistofopiatereceptor,naloxoneiswidelyusedformultiplediseaseswhicharerelatedwithabnormalreleaseofendogenousopium.TheresultsmentionedaboveindicatethatthebradycardiaeffectofMETmaybemediatedbymu2subtypeofopiatereceptorsinstea...
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