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INTRODUCTIONTheeffectivetreatmentforpostoperativepainmakespatientscomfort,facilitatingearlyrecoveryanddiminishingcardiovascularandthromboemboliccom-plications,whichhelpstoimprovepatientcarequali-tyandlowermedicalcosts.Morphinecanproducerespiratorydepressionandaddiction,whichisoftenmistakenbypatients(1),andlimititsuseinpost-operativeanalgesia.Tramadolisasynthetic,centralanalgesicagentwithoutrespiratorydepressionorsig-nificantaddiction.Tramadolhas2distinctsynergeticmechanismsofaction,bothas… 相似文献