AspirinAnti-Inflammatory Agents, Non-SteroidalPlatelet Aggregation InhibitorsCyclooxygenase InhibitorsCyclooxygenase 2 InhibitorsIbuprofenNaproxenThromboxane B2TiclopidineDiclofenacSalicylatesProstaglandin-Endoperoxide SynthasesPlatelet AggregationCyclooxygenase 1AcetaminophenDrug Therapy, CombinationCyclooxygenase 2Platelet Function TestsGastrointestinal HemorrhageGastrointestinal DiseasesIndomethacinSodium SalicylateBlood PlateletsSulfonamidesStomach UlcerPyrazolesDouble-Blind MethodKetoprofenAsthma, Aspirin-InducedEtodolacAnticoagulantsPiroxicamRisk FactorsTreatment OutcomeFibrinolytic AgentsSulfonesWarfarinSulindacGastric MucosaTablets, Enteric-CoatedAnalgesics, Non-NarcoticHemorrhageDose-Response Relationship, DrugDrug InteractionsLactonesTime FactorsDrug Administration SchedulePeptic UlcerDinoprostoneProstaglandinsBleeding TimePeptic Ulcer HemorrhageProspective StudiesAdministration, OralPlatelet ActivationThromboxanesThiazinesDrug HypersensitivityNitrobenzenesThrombosisThromboxane A2DipyridamoleMyocardial InfarctionDrug ResistanceIsoenzymesRandomized Controlled Trials as TopicLipoxinsSalicylic AcidChemopreventionStrokeSulfinpyrazoneAnticarcinogenic AgentsRisk AssessmentFollow-Up StudiesAnti-Ulcer AgentsEpoprostenolCardiovascular DiseasesReye SyndromeOsteoarthritisProton Pump InhibitorsCohort Studies