AspirinPlatelet Aggregation InhibitorsAnti-Inflammatory Agents, Non-SteroidalTiclopidineThromboxane B2Cyclooxygenase InhibitorsNerve BlockPlatelet AggregationSalicylatesPlatelet Function TestsHeart BlockDrug Therapy, CombinationBlood PlateletsSodium SalicylateFibrinolytic AgentsHemorrhageAsthma, Aspirin-InducedAnticoagulantsWarfarinTablets, Enteric-CoatedDose-Response Relationship, DrugCyclooxygenase 1Bleeding TimeProstaglandin-Endoperoxide SynthasesGastrointestinal HemorrhagePlatelet ActivationThromboxanesIbuprofenThromboxane A2Double-Blind MethodThrombosisCyclooxygenase 2 InhibitorsDipyridamoleTime FactorsLipoxinsAcetaminophenDrug ResistanceRisk FactorsIndomethacinMyocardial InfarctionTreatment OutcomeSulfinpyrazoneProspective StudiesCyclooxygenase 2Gastric MucosaStrokeReye SyndromeStomach UlcerProstaglandinsNaproxen