Acute PainAnalgesiaPainAnalgesia, EpiduralPain, PostoperativePain MeasurementAnalgesics, OpioidPain ManagementAnalgesia, Patient-ControlledAnalgesia, ObstetricalAnalgesicsPain, IntractableMorphinePain ClinicsPain ThresholdAnesthetics, LocalChronic PainBupivacaineFentanylNerve BlockAnalgesics, Non-NarcoticFacial PainTramadolInjections, SpinalHyperalgesiaNeuralgiaNociceptorsPain PerceptionLidocaineAnesthesia, EpiduralDouble-Blind MethodKetorolacMeperidineAcupuncture AnalgesiaAcute DiseaseAnesthesia Department, HospitalAnesthesia, LocalOxycodoneAmidesHydromorphoneKetorolac TromethamineBack PainLow Back PainFemoral NerveTreatment OutcomeAnti-Inflammatory Agents, Non-SteroidalLabor PainCyclohexanecarboxylic AcidsAcetaminophenAbdominal PainPalliative CareNeck PainProspective StudiesTranscutaneous Electric Nerve StimulationChronic DiseaseReceptors, Opioid, muInjections, Intra-ArticularPostoperative Nausea and VomitingAutonomic DenervationAmbulatory Surgical ProceduresSufentanilPelvic PainUnited States Department of DefenseIntercostal NervesKetoprofenAnesthesia, DentalKetaminePatient SatisfactionNaloxonePeripheral Nervous System DiseasesNarcotic AntagonistsDrug TolerancePain, ReferredDose-Response Relationship, DrugPeriaqueductal GrayTime FactorsAnesthesia, GeneralLabor, ObstetricMolar, ThirdReceptors, OpioidOpioid PeptidesAnesthesia, ObstetricalTrigeminal NeuralgiaToothacheRecovery RoomAbdomenTooth ExtractionNarcoticsDexmedetomidineShoulder PainQuestionnairesHot TemperatureDiclofenacAdministration, CutaneousAnesthesia, SpinalThalamic DiseasesAcupunctureAnesthetics, DissociativeNociceptive PainSpinal Cord