AspirinPain ManagementPainPain ClinicsPain MeasurementAnalgesicsChronic PainAnalgesics, OpioidPain, PostoperativePain, IntractablePain ThresholdAnalgesiaLow Back PainAnti-Inflammatory Agents, Non-SteroidalChronic DiseaseMorphineNeuralgiaAnalgesics, Non-NarcoticOccupational TherapyOpioid-Related DisordersPalliative CareNerve BlockBack PainTreatment OutcomePlatelet Aggregation InhibitorsPhysical Therapy ModalitiesAnesthetics, LocalAbdominal PainNeck PainQuestionnairesPelvic PainPain PerceptionReceptors, Opioid, muPatient SatisfactionProspective StudiesFacial PainAcute PainPain, ReferredNeoplasmsShoulder PainMusculoskeletal PainTiclopidineCross-Sectional StudiesThromboxane B2Cyclooxygenase InhibitorsPlatelet AggregationSalicylatesPlatelet Function TestsNociceptive PainDrug Therapy, CombinationDouble-Blind MethodBlood PlateletsSodium SalicylateFibrinolytic AgentsMyofascial Pain SyndromesHyperalgesiaTime FactorsHemorrhageComplex Regional Pain SyndromesVisceral PainDose-Response Relationship, DrugIbuprofenAsthma, Aspirin-InducedAnticoagulantsWarfarinTablets, Enteric-CoatedAcetaminophenCyclooxygenase 1Risk FactorsGastrointestinal HemorrhageFollow-Up StudiesArthralgiaProstaglandin-Endoperoxide SynthasesBleeding TimePlatelet ActivationLabor PainCyclooxygenase 2 InhibitorsThromboxanesThromboxane A2ThrombosisDipyridamoleMyocardial InfarctionNociceptorsLipoxinsIndomethacinNaproxenDrug ResistanceCyclooxygenase 2FibromyalgiaStrokeGastric MucosaDisability EvaluationSulfinpyrazoneCatastrophizationStomach UlcerRandomized Controlled Trials as TopicFlank PainDrug Administration ScheduleReye SyndromeProstaglandins