AspirinHeadacheHeadache DisordersTension-Type HeadacheCluster HeadacheVascular HeadachesMigraine DisordersHeadache Disorders, SecondaryPlatelet Aggregation InhibitorsAnti-Inflammatory Agents, Non-SteroidalMigraine without AuraTiclopidineThromboxane B2Cyclooxygenase InhibitorsPlatelet AggregationSpinal PunctureMigraine with AuraSalicylatesPlatelet Function TestsAnalgesicsDrug Therapy, CombinationBlood Patch, EpiduralTreatment OutcomeNeurologyDouble-Blind MethodTrigeminal Autonomic CephalalgiasTryptaminesSumatriptanBlood PlateletsSodium SalicylateDura MaterFibrinolytic AgentsProspective StudiesIntracranial HypotensionAnticoagulantsRisk FactorsDose-Response Relationship, DrugWarfarinHemorrhageAsthma, Aspirin-InducedIbuprofenTrigeminal NerveTablets, Enteric-CoatedTime FactorsCyclooxygenase 1PhotophobiaPrevalenceIndomethacinBleeding TimeGastrointestinal HemorrhageProstaglandin-Endoperoxide SynthasesPlatelet ActivationQuestionnairesThromboxanesChronic DiseaseFlushingFollow-Up StudiesRecurrenceDipyridamoleAcetaminophenPain MeasurementThromboxane A2Magnetic Resonance ImagingNaproxenTomography, X-Ray ComputedThrombosisCyclooxygenase 2 InhibitorsRetrospective StudiesDrug Administration ScheduleStrokeFacial PainDrug ResistanceLipoxinsNeurologic ExaminationPlacebosMyocardial InfarctionFacial NeuralgiaComorbiditySulfinpyrazoneNeck PainCerebrovascular DisordersGastric MucosaRandomized Controlled Trials as TopicDiagnostic Techniques, NeurologicalPseudotumor CerebriCyclooxygenase 2Reye SyndromeAmitriptylinePrimary PreventionStomach UlcerNeurosurgical ProceduresDrug InteractionsProstaglandinsTemporomandibular Joint DisordersRelaxation Therapy