AspirinAnti-Inflammatory Agents, Non-SteroidalPlatelet Aggregation InhibitorsMedication AdherenceMedication ErrorsCyclooxygenase InhibitorsCyclooxygenase 2 InhibitorsIbuprofenNaproxenThromboxane B2TiclopidineDiclofenacSalicylatesProstaglandin-Endoperoxide SynthasesDrug Therapy, CombinationMedication ReconciliationMedication SystemsPlatelet AggregationCyclooxygenase 1AcetaminophenMedication Systems, HospitalCyclooxygenase 2Gastrointestinal DiseasesPlatelet Function TestsGastrointestinal HemorrhageIndomethacinRisk FactorsTreatment OutcomeDrug PrescriptionsSodium SalicylateDouble-Blind MethodBlood PlateletsDose-Response Relationship, DrugSulfonamidesStomach UlcerPyrazolesProspective StudiesDrug UtilizationSelf MedicationAsthma, Aspirin-InducedKetoprofenFibrinolytic AgentsDrug InteractionsAnticoagulantsAnalgesics, Non-NarcoticEtodolacPatient ComplianceSulfonesWarfarinTablets, Enteric-CoatedTime FactorsPiroxicamSulindacGastric MucosaHemorrhageLactonesPeptic UlcerNonprescription DrugsUnited StatesPrescription DrugsFollow-Up StudiesDrug TherapyCohort StudiesDrug HypersensitivityDrug CostsDinoprostonePeptic Ulcer HemorrhagePolypharmacyProstaglandinsThiazinesBleeding TimePlatelet ActivationRetrospective StudiesRandomized Controlled Trials as TopicRisk AssessmentThromboxanesThrombosisDrug Administration ScheduleNitrobenzenesAnalgesicsPsychotropic DrugsThromboxane A2Myocardial InfarctionCardiovascular DiseasesDrug-Related Side Effects and Adverse ReactionsAntihypertensive AgentsDipyridamoleStrokeAdministration, OralCase-Control StudiesDrug ResistanceIsoenzymesPhysician's Practice PatternsProton Pump InhibitorsAntipsychotic AgentsChemopreventionIncidenceLipoxinsQuestionnairesSalicylic Acid