AspirinAnti-Inflammatory Agents, Non-SteroidalPainChronic PainPain ManagementPain, PostoperativePain ThresholdLow Back PainBack PainPain MeasurementPlatelet Aggregation InhibitorsPain, IntractableAbdominal PainIbuprofenNeck PainCyclooxygenase InhibitorsDiclofenacCyclooxygenase 2 InhibitorsNaproxenPelvic PainPain PerceptionFacial PainAcute PainPain, ReferredGastrointestinal DiseasesStomach UlcerAnalgesicsShoulder PainThromboxane B2AcetaminophenGastrointestinal HemorrhageMusculoskeletal PainTiclopidinePeptic UlcerPiroxicamDrug Therapy, CombinationFlurbiprofenSalicylatesCyclooxygenase 1Prostaglandin-Endoperoxide SynthasesPeptic Ulcer HemorrhageCyclooxygenase 2ThiazinesTreatment OutcomePlatelet AggregationDouble-Blind MethodKetoprofenRisk FactorsProspective StudiesAnalgesics, Non-NarcoticPlatelet Function TestsSulfonesNociceptive PainNeuralgiaAnalgesics, OpioidPyrazolesDose-Response Relationship, DrugProton Pump InhibitorsGastric MucosaChronic DiseaseTime FactorsSulfonamidesEtodolacAnti-Ulcer AgentsKetorolacLactonesArthritisStomach DiseasesButanonesOsteoarthritisMisoprostolBlood PlateletsSodium SalicylateFollow-Up StudiesFibrinolytic AgentsMyofascial Pain SyndromesDrug HypersensitivityHyperalgesiaQuestionnairesHemorrhageDinoprostoneDuodenal UlcerComplex Regional Pain SyndromesDrug InteractionsVisceral PainCohort StudiesAsthma, Aspirin-InducedAnticoagulantsUpper Gastrointestinal TractIntestinal DiseasesWarfarinRandomized Controlled Trials as TopicTablets, Enteric-CoatedProstaglandinsCase-Control StudiesArthralgiaRisk AssessmentTolmetinDrug Administration ScheduleIncidence