Conscious SedationAnalgesiaDeep SedationAnalgesia, EpiduralAnalgesia, ObstetricalHypnotics and SedativesAnalgesia, Patient-ControlledAnalgesics, OpioidMidazolamPain, PostoperativeFentanylPain MeasurementMorphineAnesthesia, DentalPropofolBupivacaineAnesthetics, LocalAnalgesicsMeperidineAcupuncture AnalgesiaDexmedetomidineSufentanilAnesthesia, EpiduralTerminally IllPainAnesthetics, IntravenousCritical IllnessAnesthesia Recovery PeriodDouble-Blind MethodPreanesthetic MedicationLabor PainNerve BlockAnesthesia, GeneralInjections, SpinalAnesthesia, IntravenousKetamineAnesthetics, CombinedAnesthesia, SpinalAnesthesia, LocalAnesthesia, ObstetricalAdjuvants, AnesthesiaTramadolAlfentanilAnalgesics, Non-NarcoticLabor, ObstetricChloral HydrateAnesthetics, DissociativePostoperative Nausea and VomitingIntensive Care UnitsDental AnxietyProspective StudiesClonidineAmidesRespiration, ArtificialConsciousness MonitorsNitrous OxideButorphanolLidocaineIntensive CareAnesthesia, ConductionNaloxoneDroperidolHydroxyzineDrug ToleranceAmbulatory Surgical ProceduresDiazepamCesarean SectionPain ThresholdHydromorphoneCritical CarePain ManagementKetorolacInterpleural AnalgesiaPiperidinesPostoperative CareAnesthesia, CaudalReceptors, Opioid, muInfusions, IntravenousPirinitramideNalbuphineAnesthesiaDose-Response Relationship, DrugTooth ExtractionLabor Stage, FirstPruritusPregnancyPatient SatisfactionConsciousnessReceptors, OpioidMedetomidinePain, IntractableAnti-Anxiety AgentsAnesthesia and AnalgesiaAdrenergic alpha-AgonistsMonitoring, IntraoperativeInjections, IntravenousNarcotic AntagonistsFemoral NerveTime FactorsNurse Anesthetists