Placebo EffectDouble-Blind MethodTreatment OutcomeCross-Over StudiesDepressionSymptom AssessmentSeverity of Illness IndexTime FactorsQuestionnairesPsychiatric Status Rating ScalesFollow-Up StudiesProspective StudiesAdministration, OralQuality of LifeBehavioral SymptomsDrug Therapy, CombinationRandomized Controlled Trials as TopicPainClinical Trials as TopicPain MeasurementAsthmaDrug Administration ScheduleDose-Response Relationship, DrugAnxietyRisk FactorsDepressive DisorderSingle-Blind MethodFatigueAffective SymptomsPrevalenceAnalysis of VarianceRecurrenceChronic DiseaseCoughHeadacheCross-Sectional StudiesBronchodilator AgentsLongitudinal StudiesAdministration, InhalationGastrointestinal DiseasesStress Disorders, Post-TraumaticPilot ProjectsSchizophreniaIrritable Bowel SyndromeAcute DiseaseGastroesophageal RefluxStress, PsychologicalRetrospective StudiesAffectHot FlashesNauseaGastrointestinal AgentsRespiration DisordersRandom AllocationDyspepsiaAnti-Inflammatory Agents, Non-SteroidalPhytotherapyLower Urinary Tract SymptomsAntipsychotic AgentsAntidepressive AgentsSchizophrenic PsychologyConstipationPsychotic DisordersMagnetic Resonance ImagingAge FactorsDepressive Disorder, MajorPsychometricsUrination DisordersDyspneaAnti-Inflammatory AgentsBlood PressureVomitingDelayed-Action PreparationsRespiratory SoundsComorbiditySleep Initiation and Maintenance DisordersSex FactorsCohort StudiesFlatulenceRespiratory Tract DiseasesDisease ProgressionAlbuterolHeart RateAdministration, TopicalNeuropsychological TestsPersonality InventoryOccupational DiseasesPsychophysiologic DisordersPeak Expiratory Flow RateSerotonin Uptake InhibitorsRhinitis, Allergic, SeasonalStatistics, NonparametricSubstance Withdrawal SyndromeAdministration, CutaneousRegression AnalysisPremenstrual SyndromePatient ComplianceHeartburnDrug CombinationsAttention Deficit Disorder with Hyperactivity