CocaineDopamine Uptake InhibitorsCocaine-Related DisordersNucleus AccumbensSelf AdministrationMotor ActivityRats, Sprague-DawleyBehavior, AnimalSubstance Withdrawal SyndromeConditioning, OperantDose-Response Relationship, DrugReceptors, Dopamine D1Self StimulationDopamineDopamine AntagonistsCorpus StriatumFlunarizineCrack CocaineRewardTime FactorsRacloprideVentral Tegmental AreaDrug ToleranceBenzazepinesDrug Administration ScheduleMicrodialysisLocomotionCaudate NucleusPutamenReceptors, Dopamine D2Drug InteractionsDopamine AgonistsExtinction, PsychologicalAdministration, OralBiogenic MonoaminesReinforcement (Psychology)Septal NucleiDopamine and cAMP-Regulated Phosphoprotein 32Reinforcement ScheduleAnalysis of VarianceNeostriatumBrainDynorphinsMice, Inbred C57BLPrefrontal CortexProto-Oncogene Proteins c-fosConditioning (Psychology)AmphetamineReceptors, DopamineDisease Models, AnimalBrain ChemistryCentral Nervous System StimulantsCorticotropin-Releasing HormoneGlutamic AcidNeuronsExtracellular SpaceInjections, IntravenousRNA, MessengerSynaptic TransmissionBehavior, AddictiveExcitatory Postsynaptic PotentialsDrug Administration RoutesDrug-Seeking BehaviorElectric StimulationGene Expression RegulationRats, WistarGene ExpressionUnited States Food and Drug AdministrationNarcoticsHeroinDopamine Plasma Membrane Transport ProteinsAbnormalities, MultiplePatch-Clamp TechniquesAdministration, IntranasalInjections, IntraperitonealPregnancyBenztropineSubstance Abuse DetectionChromosome AberrationsSubstance-Related DisordersRats, Long-EvansButyrylcholinesteraseStreet DrugsMagnetic Resonance ImagingInjections, SubcutaneousHeroin DependenceLiverInfusions, Intravenous