NicotineSubstance Withdrawal SyndromeNicotinic AgonistsTobacco Use DisorderGanglionic StimulantsMecamylamineReceptors, NicotinicCotinineAlcohol Withdrawal DeliriumAlcohol Withdrawal SeizuresNicotinic AntagonistsChewing GumSmoking CessationTobacco Use Cessation ProductsSmokingMorphine DependenceDihydro-beta-ErythroidineAdministration, CutaneousRats, Sprague-DawleyDose-Response Relationship, DrugBehavior, AnimalEthanolTarsalpha7 Nicotinic Acetylcholine ReceptorNaloxoneSelf AdministrationMorphineSelf StimulationConditioning, OperantWithholding TreatmentTime FactorsRewardAzocinesDrug ToleranceNucleus AccumbensAconitineCentral Nervous System DepressantsAnalysis of VarianceReinforcement (Psychology)AlcoholismCocaineMotor ActivityVentral Tegmental AreaInfusion Pumps, ImplantableDopamineTobacco, SmokelessQuinolizinesRats, WistarTobacco ProductsBicyclo Compounds, HeterocyclicBenzazepinesBrainTobaccoDopamine Uptake InhibitorsCarbon MonoxideAnabasineDrug InteractionsPyridinesDrug Administration ScheduleQuinoxalinesOpioid-Related DisordersAnxietyConditioning (Psychology)Double-Blind MethodHexamethoniumMice, Inbred C57BLProduct Recalls and WithdrawalsNeuronsBungarotoxinsHexamethonium CompoundsTobacco Smoke PollutionDisease Models, AnimalReinforcement ScheduleMotivationExtinction, PsychologicalCuesPrenatal Exposure Delayed EffectsNitrosaminesSmokeStartle Reaction