CocaineCocaine-Related DisordersDopamine Uptake InhibitorsCrack CocaineSelf AdministrationConditioning, OperantNucleus AccumbensReinforcement (Psychology)Behavior, AddictiveDrug-Seeking BehaviorBehavior, AnimalReinforcement ScheduleDose-Response Relationship, DrugExtinction, PsychologicalRats, Sprague-DawleyMotor ActivityDopamineDopamine Plasma Membrane Transport ProteinsHeroinNarcoticsRewardSubstance Withdrawal SyndromeBenztropineSubstance Abuse DetectionButyrylcholinesteraseStreet DrugsDopamine AntagonistsSubstance-Related DisordersDopamine AgonistsHeroin DependenceReceptors, Dopamine D2Time FactorsVentral Tegmental AreaRats, Long-EvansCorpus StriatumCuesConditioning (Psychology)SaimiriAnalysis of VarianceMicrodialysisPrenatal Exposure Delayed EffectsDrug InteractionsReceptors, Dopamine D3Gas Chromatography-Mass SpectrometryMacaca mulattaBrainMethadoneMethamphetamineInjections, IntravenousOpioid-Related DisordersDextroamphetamineAmphetamineQuinpiroleTropanesBenzazepinesChoice BehaviorMotivationCarboxylic Ester HydrolasesDiscrimination LearningFlupenthixolLocomotionDisulfiramStereotyped Behavior