Breakthrough PainAdministration, BuccalFentanylAnalgesics, OpioidPainLabor PainPain MeasurementAnalgesicsPain ManagementChronic PainAnalgesia, EpiduralPain, PostoperativeDouble-Blind MethodTryptaminesPain, IntractablePrescription Drug MisuseMigraine DisordersTreatment OutcomeNeoplasmsChronic DiseaseArthralgiaMedication ErrorsMedication AdherenceNeuralgiaTime FactorsPalliative CareAnti-Inflammatory Agents, Non-SteroidalSumatriptanProspective StudiesQuestionnairesSerotonin Receptor AgonistsPain ThresholdClonixinSeverity of Illness IndexLoxapineQuality of LifeRadionuclide GeneratorsRetrospective StudiesLow Back PainBack PainFluoxetinePatient SatisfactionAntidepressive Agents, Second-GenerationFollow-Up StudiesAbdominal PainAntipsychotic AgentsNeck PainAntidepressive AgentsComorbidityMedication ReconciliationErgotamineMedication SystemsMedication Systems, HospitalSerotonin Uptake InhibitorsCohort StudiesPelvic PainDose-Response Relationship, DrugPain PerceptionNaproxenRecurrenceDrug Administration ScheduleFacial PainAdministration, Oral