Benzhydryl CompoundsCentral Nervous System StimulantsWakefulnessAmphetamine-Related DisordersDisorders of Excessive SomnolenceWakefulness-Promoting AgentsNarcolepsyCommodificationMethamphetamineDopamine Plasma Membrane Transport ProteinsSleep DeprivationPerformance-Enhancing SubstancesDouble-Blind MethodMetaphorArousalNeuroprotective AgentsSleep Disorders, Circadian RhythmBacopaNootropic AgentsCreativityDextroamphetamineCocaine-Related DisordersRaclopridePleasureSleepPemolineCross-Over StudiesSodium OxybateAkathisia, Drug-InducedCocaineFlupenthixolFatigueHypothalamus, PosteriorPlacebosCognitionNorepinephrine Plasma Membrane Transport ProteinsHeadacheCentral Nervous System AgentsElectrooculographyCaudate NucleusElectroencephalographyDose-Response Relationship, DrugSociology, MedicalMemory, Short-TermNeurotransmitter Uptake InhibitorsDopamine AntagonistsDopamine AgonistsPsychomotor PerformanceAmphetamineSleep, REMPsychoses, Substance-InducedSelf AdministrationFreezing Reaction, CatalepticAttentionMotor ActivityBehavior, AnimalSubstance Withdrawal SyndromeDopamine Uptake InhibitorsLearning DisordersPolysomnographyNeuropsychological TestsSpatial BehaviorContinuous Positive Airway PressureIntention to Treat AnalysisAnalysis of VarianceReceptors, DopaminePhenethylaminesReceptors, Dopamine D2BenzazepinesReinforcement (Psychology)BrainCognition DisordersReceptors, Dopamine D1ElectromyographyBody TemperatureMicrodialysisTreatment OutcomeBehavior, AddictivePutamenExtinction, PsychologicalCaffeinePsychiatric Status Rating ScalesReceptors, Dopamine D3Time FactorsProblem SolvingSleep Apnea, ObstructiveDopamineTabletsWork Schedule ToleranceNucleus AccumbensNauseaReaction TimeSynaptosomesMacaca mulattaAttention Deficit Disorder with HyperactivitySerotonin Plasma Membrane Transport ProteinsSubstance Abuse DetectionSeverity of Illness IndexChoice BehaviorMotivation