AnxietyAnalgesicsAnxiety DisordersAnalgesics, OpioidAnalgesics, Non-NarcoticAnalgesiaPainPain MeasurementDental AnxietyManifest Anxiety ScaleAnxiety, SeparationPhobic DisordersMorphinePain, PostoperativeTramadolTest Anxiety ScaleDepressionPhenacetinAcetaminophenAnti-Anxiety AgentsPsychiatric Status Rating ScalesDextropropoxyphenePanic DisorderDepressive DisorderDrug TolerancePain ThresholdAnti-Inflammatory Agents, Non-SteroidalQuestionnairesStress, PsychologicalCodeinePerformance AnxietyPain ManagementFearFentanylMeperidineAnesthetics, LocalDouble-Blind MethodPentazocineReceptors, Opioid, muHyperalgesiaOxycodoneDipyronePersonality InventoryInjections, SpinalCognitive TherapyMood DisordersBupivacaineBehavior, AnimalNaloxoneAnalgesia, EpiduralDose-Response Relationship, DrugAnalgesia, Patient-ControlledComorbidityHypnotics and SedativesNarcotic AntagonistsTreatment OutcomeCarrageenanKetoprofenPain, IntractableReceptors, OpioidKidney Papillary NecrosisTolmetinNeuralgiaAgoraphobiaEmotionsAdaptation, PsychologicalNefopamHydrocodoneKetorolacCyclohexanecarboxylic AcidsIbuprofenNociceptionHydromorphoneTime FactorsPsychometricsQuality of LifeProspective StudiesNalorphineSeverity of Illness IndexPanicAnalysis of VarianceAcupuncture AnalgesiaDiagnostic and Statistical Manual of Mental DisordersRats, Sprague-DawleyHypochondriasisAffectAmygdalaBuprenorphineChronic PainEdemaMental DisordersExploratory BehaviorNociceptorsDepressive Disorder, MajorDiclofenacAnalgesia, ObstetricalNarcoticsKetamineButorphanolMaze Learning