AspirinMigraine DisordersHeadacheMigraine with AuraMigraine without AuraHeadache DisordersTension-Type HeadacheCluster HeadacheVascular HeadachesHeadache Disorders, SecondaryPlatelet Aggregation InhibitorsAnti-Inflammatory Agents, Non-SteroidalTryptaminesSumatriptanTiclopidineThromboxane B2Cyclooxygenase InhibitorsPlatelet AggregationSalicylatesPhotophobiaAnalgesicsPlatelet Function TestsDrug Therapy, CombinationDouble-Blind MethodBlood PlateletsDihydroergotamineErgotamineTreatment OutcomeCortical Spreading DepressionSodium SalicylateNaproxenRisk FactorsFibrinolytic AgentsProspective StudiesHemorrhageDose-Response Relationship, DrugAnticoagulantsAsthma, Aspirin-InducedWarfarinDura MaterSerotonin Receptor AgonistsIbuprofenTablets, Enteric-CoatedPizotylineCyclooxygenase 1NeurologyTime FactorsBleeding TimeGastrointestinal HemorrhageProstaglandin-Endoperoxide SynthasesPlatelet ActivationThromboxanesPain MeasurementPrevalenceSpinal PunctureStrokeFlushingThromboxane A2QuestionnairesAcetaminophenRecurrenceFollow-Up StudiesDipyridamoleThrombosisChronic DiseaseIndomethacinCyclooxygenase 2 InhibitorsTrigeminal Autonomic CephalalgiasComorbidityBlood Patch, EpiduralDrug ResistanceRandomized Controlled Trials as TopicLipoxinsMyocardial InfarctionHeadache Disorders, PrimaryCase-Control StudiesCalcitonin Gene-Related PeptideCerebrovascular DisordersSulfinpyrazoneDrug Administration ScheduleMagnetic Resonance ImagingGastric MucosaHyperacusisRetrospective StudiesPlacebosCohort StudiesForamen Ovale, PatentCyclooxygenase 2Cross-Over StudiesReye SyndromeOphthalmoplegic MigraineAnalgesics, Non-NarcoticTrigeminal NucleiStomach UlcerFacial PainProstaglandinsPrimary PreventionCardiovascular DiseasesDrug Interactions