NarcoticsAnalgesicsAnalgesics, OpioidAnti-Inflammatory Agents, Non-SteroidalNalorphineAnalgesics, Non-NarcoticDrug and Narcotic ControlMorphineLevorphanolMeperidineAnalgesiaPainPentazocineIbuprofenPain, PostoperativePain MeasurementNarcotic AntagonistsLevallorphanDiclofenacDextropropoxypheneAcetaminophenCyclooxygenase 2 InhibitorsNaproxenFentanylCyclooxygenase InhibitorsMorphinansCyclazocineOpiumCodeineAspirinFlurbiprofenKetoprofenSulindacAlphaprodinePiroxicamOxymorphoneTolmetinLegislation, DrugOpioid-Related DisordersMethadoneTramadolDrug ToleranceOxycodoneIndomethacinKetorolacProstaglandin-Endoperoxide SynthasesHydrocodonePain ManagementThiazinesPhenacetinDose-Response Relationship, DrugPain, IntractableHeroinCyclooxygenase 2Preanesthetic MedicationCyclooxygenase 1Gastrointestinal DiseasesPyrazolesHydromorphoneSulfonamidesReceptors, Opioid, muDouble-Blind MethodAnalgesia, Patient-ControlledAnesthetics, LocalEtodolacBupivacaineDipyroneReceptors, OpioidButorphanolSubstance-Related DisordersAlfentanilSpasmMorphine DerivativesAnti-Inflammatory AgentsBuprenorphineDrug InteractionsTime FactorsPain ThresholdHyperalgesiaFenoprofenTreatment OutcomeGrowth Differentiation Factor 15Inert Gas NarcosisMethotrimeprazineKetorolac TromethamineEndorphinsNitrous OxideCarrageenanMorphine DependencePhenylbutazoneDrug PrescriptionsInjections, SpinalStomach UlcerAlcoholics AnonymousKidney Papillary NecrosisSulfonesDiflunisalNitrobenzenesClonixinMitragyna