AspirinPlatelet Aggregation InhibitorsAnti-Inflammatory Agents, Non-SteroidalTiclopidineThromboxane B2Cyclooxygenase InhibitorsPlatelet AggregationSalicylatesPlatelet Function TestsDrug Therapy, CombinationBlood PlateletsSodium SalicylateFibrinolytic AgentsHemorrhageAsthma, Aspirin-InducedAnticoagulantsWarfarinTablets, Enteric-CoatedCyclooxygenase 1Bleeding TimeGastrointestinal HemorrhageProstaglandin-Endoperoxide SynthasesPlatelet ActivationThromboxanesIbuprofenThromboxane A2Dose-Response Relationship, DrugThrombosisCyclooxygenase 2 InhibitorsDouble-Blind MethodDipyridamoleLipoxinsAcetaminophenDrug ResistanceIndomethacinRisk FactorsMyocardial InfarctionSulfinpyrazoneGastric MucosaCyclooxygenase 2Reye SyndromeStrokeTreatment OutcomeStomach UlcerProspective StudiesProstaglandinsNaproxen