Analgesics, OpioidAnesthetics, IntravenousAnalgesia, EpiduralSufentanilAdjuvants, AnesthesiaAnesthesia, IntravenousAlfentanilPain, PostoperativeBupivacaineAdministration, CutaneousPreanesthetic MedicationAnesthetics, CombinedAnalgesia, ObstetricalPropofolAnesthesia, GeneralMorphineAnalgesia, Patient-ControlledAnesthesia Recovery PeriodMidazolamPain MeasurementReceptors, Opioid, muAnesthetics, LocalNitrous OxideBreakthrough PainDouble-Blind MethodNarcoticsIsofluraneAnesthetics, InhalationAnesthesia, EpiduralNaloxoneAnesthesia, ObstetricalMethyl EthersDroperidolAnalgesiaPainConscious SedationInjections, SpinalAnesthesiaMeperidineAnesthesia, InhalationHypnotics and SedativesDrug InteractionsAnestheticsDose-Response Relationship, DrugTransdermal PatchNarcotic AntagonistsAdministration, BuccalInjections, IntravenousCesarean SectionInfusion PumpsPostoperative Nausea and VomitingEnfluraneInfusions, IntravenousNeuromuscular Nondepolarizing AgentsAnesthesia, SpinalHemodynamicsAnalgesicsThiopentalOxycodoneLaryngismusIntubation, IntratrachealAmbulatory Surgical ProceduresKetamineAnesthesia, IntratrachealSuccinylcholineDexmedetomidinePiperidinesLidocaineDrug ToleranceNalbuphineThoracotomyOxymorphoneDeep SedationDermatologic Surgical ProceduresLoperamideRespirationMuscle RigidityMandibular OsteotomyHydromorphoneApneaEtomidateVecuronium BromideMethohexitalHeart RateBuprenorphineUnconsciousnessNeuroleptanalgesiaProspective StudiesMedetomidineSupratentorial NeoplasmsIntraoperative PeriodAndrostanolsAtracuriumClonidineDrug OverdoseNerve BlockTetanyKetorolacReceptors, OpioidAnesthesia, Dental