NarcoticsAnalgesicsSleep StagesAnalgesics, OpioidNalorphineDrug and Narcotic ControlAnalgesics, Non-NarcoticPain, PostoperativeMorphinePainLevorphanolMeperidinePentazocineAnalgesiaTrazodoneNarcotic AntagonistsLevallorphanAutomobile DrivingPain MeasurementDextropropoxypheneDouble-Blind MethodHypnotics and SedativesHolidaysHistamine H1 AntagonistsFentanylMorphinansCyclazocineOpiumCodeineAmitriptylineMetoclopramideAlphaprodineSleepDibenzazepinesOxymorphoneInfrared RaysLegislation, DrugOpioid-Related DisordersElectroencephalographyPlacebosOcular Physiological PhenomenaMethadoneTramadolDrug ToleranceSleep Initiation and Maintenance DisordersOxycodoneAcetaminophenWakefulnessHydrocodoneDose-Response Relationship, DrugFatiguePhenacetinDiazepamTime FactorsHeroinArousalTreatment OutcomePreanesthetic MedicationVomitingCross-Over StudiesPain ManagementHydromorphonePain, IntractableAccidents, TrafficNauseaReceptors, Opioid, muClinical Trials as TopicAnticonvulsantsAnesthetics, LocalDrug Administration ScheduleProspective StudiesEpilepsyBupivacaineAdministration, OralReceptors, OpioidAnti-Inflammatory Agents, Non-SteroidalButorphanolSubstance-Related DisordersAnalgesia, Patient-ControlledAlfentanilSpasmMorphine DerivativesBuprenorphinePsychomotor PerformancePain ThresholdInert Gas NarcosisMethotrimeprazineEndorphinsNitrous OxideMorphine DependenceAlcoholics AnonymousMitragynaAnesthesiaNaltrexoneDipyroneHyperalgesiaIsonipecotic AcidsInjections, SpinalPapaverNerve Block