Fentanyl/fluanisone

Fentanyl/fluanisone (trade name Hypnorm^[1]) is a veterinary combination drug consisting of fentanyl (a potent synthetic narcotic analgesic with a rapid onset and short duration of action) and fluanisone (a typical antipsychotic and sedative of the butyrophenone class) for use in mice, rats, rabbits and guinea pigs.^{[citation needed]}