Anesthetics, DissociativeXylazineAnalgesicsExcitatory Amino Acid AntagonistsAnesthetics, CombinedAnestheticsMidazolamThiopentalReceptors, N-Methyl-D-AspartateDepressive Disorder, Treatment-ResistantAcepromazineAnesthesia, IntravenousAnesthetics, IntravenousConscious SedationPropofolAnesthesiaStereoisomerismMedetomidineAdjuvants, AnesthesiaPentobarbitalAnesthesia, CaudalPsychoses, Substance-InducedDose-Response Relationship, DrugAnesthesia, GeneralPreanesthetic MedicationPain, PostoperativeTiletamineDouble-Blind MethodAnalgesiaInjections, IntramuscularAnalgesics, OpioidAntidepressive AgentsMorphinePain, IntractablePain MeasurementFentanylDrug InteractionsRats, Sprague-DawleyZolazepamPhencyclidineMemantineInjections, SpinalEtomidateHallucinogensDizocilpine MaleateAnesthesia, DentalRespirationDexmedetomidineDiazepamDextromethorphanAmnesia, AnterogradeInfusions, IntravenousN-MethylaspartateAnesthesia Recovery PeriodAdjuvants, PharmaceuticRiluzoleHyperalgesiaHalothaneInjections, IntravenousSurgical Procedures, MinorAnesthesia, RectalNeurotoxicity SyndromesNitrous OxideBrainAnesthetics, InhalationCross-Over StudiesDissociative DisordersSecobarbitalHeart RateAdministration, RectalAnalgesia, EpiduralDrug SynergismRats, WistarElectroencephalographyNefopamAnesthetics, GeneralIsofluraneAlfaxalone Alfadolone MixtureAnesthesia, InhalationSubstance Abuse DetectionAnesthetics, LocalDrug CombinationsPainBehavior, AnimalPreservatives, PharmaceuticalTilidineChlorobutanolLevorphanolMethohexitalComplex Regional Pain SyndromesSilver StainingBlood PressurePain ThresholdLidocaineDroperidolDrug ToleranceStreet DrugsTime FactorsPromethazineAnalgesia, Patient-Controlled