Analgesics, OpioidAnesthetics, IntravenousAnalgesia, EpiduralSufentanilAdjuvants, AnesthesiaAnesthesia, IntravenousAdministration, CutaneousAlfentanilBupivacainePain, PostoperativePreanesthetic MedicationAnesthetics, CombinedAnalgesia, ObstetricalPropofolAnesthesia, GeneralMorphineAnalgesia, Patient-ControlledAnesthesia Recovery PeriodMidazolamPain MeasurementReceptors, Opioid, muAnesthetics, LocalNitrous OxideNarcoticsBreakthrough PainDouble-Blind MethodIsofluraneDose-Response Relationship, DrugAnesthetics, InhalationAnesthesia, EpiduralNaloxonePainMethyl EthersAnesthesia, ObstetricalAnalgesiaDroperidolInjections, SpinalConscious SedationDrug InteractionsModels, ChemicalAnesthesiaMeperidineAnesthesia, InhalationHypnotics and SedativesAnestheticsChemical PhenomenaTransdermal PatchNarcotic AntagonistsMultiple Chemical SensitivityInjections, IntravenousAdministration, BuccalChemical IndustryCesarean SectionAnalgesicsInfusion PumpsInfusions, IntravenousNeuromuscular Nondepolarizing AgentsPostoperative Nausea and VomitingEnfluraneMagnetic Resonance SpectroscopyAnesthesia, SpinalHemodynamicsChemical WarfareThiopentalOrganic ChemicalsOxycodoneHazardous SubstancesInorganic ChemicalsPiperidinesIntubation, IntratrachealLaryngismusBurns, ChemicalKetamineAmbulatory Surgical ProceduresSuccinylcholineAnesthesia, IntratrachealLidocaineTime FactorsDexmedetomidineDrug ToleranceGas Chromatography-Mass SpectrometryNalbuphineThoracotomyOxymorphoneLoperamideMolecular StructureChemical Warfare AgentsDeep SedationDermatologic Surgical ProceduresRespirationMuscle RigidityApneaMandibular OsteotomyWater Pollutants, ChemicalHeart RateHydromorphoneAmidesEtomidateVecuronium BromideBuprenorphine