PentobarbitalGABA ModulatorsHypnotics and SedativesBarbituratesAdjuvants, AnesthesiaAnestheticsChloraloseEuthanasia, AnimalReceptors, GABA-AAnesthesiaDiazepamXylazineKetamineThiopentalIsofluraneHalothaneUrethaneDogsDose-Response Relationship, Druggamma-Aminobutyric AcidChloral HydrateAnesthetics, GeneralEtherDextroamphetamineChlordiazepoxideAnesthesia, IntravenousSecobarbitalGABA-A Receptor AgonistsReinforcement SchedulePregnanedionesEtomidateColumbidaePropofolPicrotoxinGABA AgonistsAnesthetics, InhalationTriazolamPhencyclidineGABA-A Receptor AntagonistsAminobenzoatesEthoxzolamideRats, Inbred StrainsAnesthetics, IntravenousMeprobamateAnesthetics, DissociativeRats, Sprague-DawleySorboseHexobarbitalBrainDrug InteractionsMuscimolDiuretics, OsmoticDiscrimination LearningCats