Azaperone (Fluoperidol) is a pyridinylpiperazine and butyrophenone neuroleptic drug with sedative and antiemetic effects, which is used mainly as a tranquilizer in veterinary medicine.

Azaperone eliminates fighting only for a few hours after it is administered, after which the behaviour of pigs treated with it is not different from that of non-tranquillized mixed pigs. [1] Azaperone (2.2 mg/kg i.m.) reduces total fighting from 309.8 min for saline to 189.6 min in pigs. [2] Azaperone (103.1 mg) combined with Butorphanol (69.3 mg) produces adequate muscle relaxation and apparently adequate analgesia for minor surgical interferences, including abdominal laparoscopy, in a white rhinoceros with chronic renal disease. [3] Azaperone combined with Butorphanol and Medetomidine (BAM: 0.43 mg/kg Butorphanol, 0.36 mg/kg Azaperone, 0.14 mg/kg Medetomidine) results in a predictable onset of sedation, with a mean induction time to lateral recumbency of 9.8 min, in white-tailed deer. Azaperone combined with Butorphanol and Medetomidine (BAM: 0.43 mg/kg Butorphanol, 0.36 mg/kg Azaperone, 0.14 mg/kg Medetomidine) results in decreased heart rate and increased arterial partial pressure of carbon dioxide (PaCO2) in white-tailed deer. [4] Azaperone (1.0 mg/kg) combined with Ketamine (15 mg/kg) and Climazolam (1.5 mg/kg) results in a significantly higher castration score, when administrated intranasally (IN) compared with intramuscularly (IM) in piglets, there is an association between castration score and room temperature in the IN group. Azaperone (1.0 mg/kg) combined with Ketamine (15 mg/kg) and Climazolam (1.5 mg/kg) results in higher heart rate in the IN group of piglets. Azaperone (1.0 mg/kg) combined with Ketamine (15 mg/kg) and Climazolam (1.5 mg/kg) results in higher respiratory rate and walking significantly faster in the IM group of piglets. [5]