A case of treatment on amitraz toxicosis in a Thoroughbred racehorse

Thoroughbred 경주마에서 amitraz 중독증 치료 1례

  • Yang, Jaehyuk (Equine Hospital of Busan Race Park, Korea Racing Authority) ;
  • Song, Heeeun (Equine Hospital of Busan Race Park, Korea Racing Authority) ;
  • Lee, Kyuong-Kap (College of Veterinary Medicine, Jeju National University) ;
  • Jee, Youngheun (College of Veterinary Medicine, Jeju National University) ;
  • Woo, Ho-Choon (College of Veterinary Medicine, Jeju National University) ;
  • Lim, Yoon-Kyu (College of Veterinary Medicine, Jeju National University)
  • 양재혁 (한국마사회 부산경남경마공원) ;
  • 송희은 (한국마사회 부산경남경마공원) ;
  • 이경갑 (제주대학교 수의과대학) ;
  • 지영흔 (제주대학교 수의과대학) ;
  • 우호춘 (제주대학교 수의과대학) ;
  • 임윤규 (제주대학교 수의과대학)
  • Accepted : 2010.08.18
  • Published : 2010.09.30


A 3-year-old female Thoroughbred racehorse was presented following the accidental oral and skin administration of amitraz. This case report describes the clinical signs and the treatment of this horse. Clinical signs of amitraz toxicosis are associated with the stimulation of alpha2-adrenergic receptors. Amitraz is seldom fatal because the effects can be reversed by alpha2-adrenergic antagonists. The horse displayed typical clinical signs of colic, including pawing, small hard drops, tranquillisation, depression, ataxia, muscular incoordination and impaction colic lasting up to 7 days. The syndrome was accompanied by mild dehydration. The horse survived after persistent symptomatic treatment, including the giving of intravenous fluids, antibiotics, multiple doses of mineral oil per os, nonsteroidal anti-inflammatory drugs and dexamethasone intramuscularly and intravenously.


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