Evaluation of some drug combinations for sedation in the dog

A double blind trial was performed in order to investigate the effects of some sedatives in the dog. One hundred and forty-two dogs undergoing radiography for the BVA/KC hip dysplasia scheme were sedated with combinations of acepromazine with pethidine or buprenorphine, or with acepromazine alone. The degree of sedation, resistance to manipulation, sensitivity to noise and response to pain were assessed, and arterial blood samples taken for blood gas analysis. In all respects the combinations of acepromazine with buprenorphine or pethidine produced significantly better sedation than acepromazine alone. Pa0₂ and pH were lower and PaCO₂ higher in dogs receiving the combinations compared with those receiving acepromazine alone, but all values were within normal limits. It was concluded that combinations of pethidine or buprenorphine with acpromazine provide extremely effective and safe sedation in the dog.