CaffeineSubstance Withdrawal SyndromeCentral Nervous System StimulantsAlcohol Withdrawal DeliriumAlcohol Withdrawal SeizuresTheobromineCoffeeMorphine DependenceEthanolNaloxoneRyanodineWithholding TreatmentCalciumCytochrome P-450 CYP1A2Dose-Response Relationship, DrugMorphineTime FactorsProcaineDrug ToleranceRats, Sprague-DawleyNicotinePhosphodiesterase InhibitorsBehavior, AnimalReceptor, Adenosine A2ASarcoplasmic ReticulumCentral Nervous System DepressantsDouble-Blind MethodRyanodine Receptor Calcium Release ChannelDrug InteractionsBeveragesMuscle ContractionTobacco Use DisorderReceptor, Adenosine A1Drinking BehaviorAlcoholismRats, WistarAdenosine A2 Receptor AntagonistsSelf StimulationProduct Recalls and WithdrawalsOpioid-Related DisordersEphedrinePaulliniaAnalysis of VarianceMalignant HyperthermiaDrug Administration ScheduleMecamylaminePurinergic P1 Receptor AntagonistsNicotinic AgonistsCocaineMotor ActivityTetracaineLife Support CareAdenosine A1 Receptor AntagonistsReceptors, Adenosine A2Membrane PotentialsNucleus AccumbensCross-Over StudiesAnticonvulsantsHyperalgesiaAnxietyHeroinAnti-Anxiety AgentsDrug Residues