NarcoticsCaspases, EffectorMorphineReceptors, Opioid, muBenzodiazepinesNaloxoneFlumazenilAnalgesics, OpioidFlunitrazepamEnkephalin, Ala(2)-MePhe(4)-Gly(5)-DiazepamReceptors, GABA-AAnti-Anxiety AgentsBenzodiazepinonesGABA ModulatorsBehavior, AnimalFlurazepamLorazepamCarbolinesGABA-A Receptor AgonistsOpiate AlkaloidsClonazepamFeeding BehaviorMidazolamChlordiazepoxideSubstance Withdrawal SyndromeOpioid-Related DisordersHypnotics and SedativesReceptors, OpioidAlprazolamTriazolamIsoquinolinesGABA-A Receptor AntagonistsConvulsantsSocial BehaviorHealth BehaviorNitrazepamNordazepamBrainBehaviorMuscimolSexual BehaviorExploratory BehaviorMethadoneOxazepamDiazepam Binding InhibitorSubstance Abuse DetectionNarcotic AntagonistsHeroinSexual Behavior, AnimalPentylenetetrazoleCodeinegamma-Aminobutyric AcidTemazepamEndorphinsEnkephalinsChild BehaviorDrug ToleranceSubstance-Related DisordersDose-Response Relationship, DrugMorphine DerivativesGABA AgonistsAdolescent BehaviorCyclazocineTime FactorsAnxietyHeroin DependenceMotor ActivityPentobarbitalEnzyme Multiplied Immunoassay TechniqueEtorphineBuprenorphineRats, Sprague-DawleyChild Behavior DisordersEthylketocyclazocineReceptors, GABAMaternal BehaviorOpiumSeizuresAnticonvulsantsClorazepate DipotassiumStereotyped BehaviorBehavior TherapyPyridazinesBarbituratesAggressionDihydromorphineEnkephalin, Leucine-2-AlanineMorphine DependenceRadioligand AssayCerebral CortexRats, Inbred StrainsNaltrexonePregnanoloneAnalysis of VarianceBrain ChemistryLigandsReceptors, DrugEnkephalin, MethionineKinetics