Analgesics, OpioidAnesthetics, IntravenousAnalgesia, EpiduralSufentanilAdjuvants, AnesthesiaAnesthesia, IntravenousAlfentanilBupivacainePain, PostoperativeAdministration, CutaneousProtein BiosynthesisPreanesthetic MedicationAnesthetics, CombinedAnalgesia, ObstetricalPropofolAnesthesia, GeneralMorphineAnalgesia, Patient-ControlledAnesthesia Recovery PeriodMidazolamProtein Synthesis InhibitorsDose-Response Relationship, DrugKineticsReceptors, Opioid, muPain MeasurementAnesthetics, LocalNitrous OxideStereoisomerismDouble-Blind MethodBreakthrough PainRNA, MessengerNarcoticsMolecular StructureCells, CulturedTime FactorsMolecular Sequence DataIsofluraneAnesthetics, InhalationEscherichia coliCycloheximideDNAAnesthesia, EpiduralNaloxoneMethyl EthersAnesthesia, ObstetricalDNA ReplicationCyclizationPainDrug InteractionsAnalgesiaDroperidolInjections, SpinalConscious SedationBase SequenceAnesthesiaCell LineMutationMeperidineTritiumHypnotics and SedativesAnesthesia, InhalationLeucineAnestheticsLiverTranscription, GeneticCarbon IsotopesRNATransdermal PatchInjections, IntravenousDactinomycinNarcotic AntagonistsInfusions, IntravenousCell-Free SystemAdministration, BuccalBacterial ProteinsChemistry Techniques, SyntheticInfusion PumpsCesarean SectionHemodynamicsAnalgesicsPostoperative Nausea and VomitingPuromycinThymidineEnfluraneAmino Acid SequenceNeuromuscular Nondepolarizing AgentsPiperidinesPeptide BiosynthesisThiopentalAnesthesia, SpinalAmino AcidsChloramphenicolChemistry, OrganicAmidesStructure-Activity RelationshipCell DivisionOxycodoneMagnetic Resonance SpectroscopyModels, BiologicalRats, Sprague-Dawley