XylazineHeroin DependenceAcepromazineKetamineAnesthetics, DissociativeThiazinesVeterinary DrugsMedetomidineNarcoticsAdrenergic alpha-AgonistsAnestheticsPhysiological ProcessesAnesthetics, CombinedMorphine DerivativesHypnotics and SedativesMethadoneAnesthesiaEuthanasia, AnimalNurses, MaleZolazepamDioxanesTiletamineSurgery, Veterinary