AspirinAnti-Inflammatory Agents, Non-SteroidalPlatelet Aggregation InhibitorsThromboxane B2Platelet AggregationTiclopidineBlood PlateletsDrug Therapy, CombinationDouble-Blind MethodDose-Response Relationship, DrugIbuprofenCyclooxygenase InhibitorsCyclooxygenase 2 InhibitorsNaproxenDiclofenacSulindacFlurbiprofenProstaglandin-Endoperoxide SynthasesIndomethacinPiroxicamCyclooxygenase 1Cyclooxygenase 2AcetaminophenKetoprofenSalicylatesEtodolacTolmetinSodium SalicylatePyrazolesSulfonamidesThiazinesStomach UlcerGastrointestinal HemorrhageKetorolacDinoprostoneGastrointestinal DiseasesPhenylbutazoneProstaglandinsGrowth Differentiation Factor 15NitrobenzenesAnalgesics, Non-NarcoticPlatelet Function TestsSulfonesAnti-Inflammatory AgentsRisk FactorsFenoprofenDrug HypersensitivityLactonesIsoenzymesAsthma, Aspirin-InducedDrug InteractionsGastric MucosaStereoisomerismAnticarcinogenic AgentsPeptic Ulcer HemorrhageChemopreventionAnalgesicsThromboxanesDiflunisalTropaeolaceaeTime FactorsProspective StudiesWarfarinAnticoagulantsOxyphenbutazoneNonsteroidal Anti-AndrogensPeptic UlcerFibrinolytic AgentsProstaglandin AntagonistsTreatment OutcomeClonixinCase-Control StudiesLipoxins