Anti-Inflammatory Agents, Non-SteroidalAnalgesicsNarcoticsIbuprofenDiclofenacTolmetinNaproxenCyclooxygenase 2 InhibitorsFlurbiprofenCyclooxygenase InhibitorsPiroxicamAnalgesics, OpioidAcetaminophenKetoprofenEtodolacAspirinAnalgesics, Non-NarcoticIndomethacinKetorolacProstaglandin-Endoperoxide SynthasesFenoprofenPyrazolesSulindacSulfonamidesGastrointestinal DiseasesPainCyclooxygenase 2Anti-Inflammatory AgentsNalorphineMorphineCyclooxygenase 1SalicylatesDiflunisalPhenylbutazoneThiazinesPain, PostoperativeLactonesPain MeasurementSulfonesDrug and Narcotic ControlNitrobenzenesStomach UlcerArthritisDose-Response Relationship, DrugProstaglandinsSodium SalicylateLevorphanolMeperidineAnalgesiaDouble-Blind MethodTennesseeIsoenzymesDinoprostonePentazocineInflammationNarcotic AntagonistsLevallorphanAntirheumatic AgentsOsteoarthritisSpondylitis, AnkylosingDrug Therapy, CombinationDextropropoxypheneDrug InteractionsAnti-Ulcer AgentsCase-Control StudiesRisk FactorsGastrointestinal HemorrhageArthritis, RheumatoidDuodenal UlcerFentanylEdemaMorphinansCyclazocineOpiumTreatment OutcomeCodeineColonic NeoplasmsCarrageenanProspective StudiesMembrane ProteinsAlphaprodineCohort StudiesOxymorphoneTime FactorsLegislation, DrugOpioid-Related DisordersRiskRats, Sprague-DawleyArachidonic AcidMethadoneTramadolDrug ToleranceOxycodoneOsteoarthritis, KneeLogistic ModelsMethotrexateRetrospective StudiesHydrocodonePain ManagementPhenacetin