Migraine DisordersHeadacheAspirinMigraine with AuraMigraine without AuraHeadache DisordersTension-Type HeadacheCluster HeadacheVascular HeadachesHeadache Disorders, SecondaryTryptaminesSumatriptanAnti-Inflammatory Agents, Non-SteroidalPlatelet Aggregation InhibitorsPhotophobiaAnalgesicsErgotamineDihydroergotamineCortical Spreading DepressionTiclopidineDura MaterSerotonin Receptor AgonistsThromboxane B2PizotylineTreatment OutcomeNeurologyCyclooxygenase InhibitorsPlatelet AggregationDouble-Blind MethodSpinal PuncturePain MeasurementNaproxenDrug Therapy, CombinationSalicylatesPrevalenceRisk FactorsPlatelet Function TestsTrigeminal Autonomic CephalalgiasQuestionnairesBlood Patch, EpiduralProspective StudiesChronic DiseaseHeadache Disorders, PrimaryComorbidityBlood PlateletsCalcitonin Gene-Related PeptideFlushingHyperacusisForamen Ovale, PatentTime FactorsMagnetic Resonance ImagingOphthalmoplegic MigraineTrigeminal NucleiFacial PainDose-Response Relationship, DrugRecurrencePrecipitating FactorsMeningesSodium SalicylateFollow-Up StudiesIbuprofenFibrinolytic AgentsVertigoRelaxation TherapyCase-Control StudiesIntracranial HypotensionAnticoagulantsAmitriptylineStrokeRetrospective StudiesWarfarinPlacebosHemorrhageMotion SicknessTrigeminal GanglionAsthma, Aspirin-InducedAnalgesics, Non-NarcoticPainNeurologic ExaminationRandomized Controlled Trials as TopicNauseaFlunarizineTrigeminal NerveTablets, Enteric-CoatedCross-Over StudiesHabituation, PsychophysiologicCyclooxygenase 1Cohort StudiesPain ClinicsMeningeal ArteriesNeuromuscular AgentsAcetaminophenSeverity of Illness IndexSex FactorsTrigeminal Nucleus, SpinalTomography, X-Ray ComputedIndomethacinBleeding TimeCerebrovascular DisordersGastrointestinal Hemorrhage