Animal Pain pp 179-205 | Cite as

Evaluation of Analgesic Drugs in Horses

  • William V. Lumb
  • Ney L. Pippi
  • Marissak Kalpravidh


Of the domesticated species of animals, horses are probably most refractory to effects of analgesic drugs. At the same time, a great need exists for effective agents that produce a sedative and analgesic effect in this species. A striking example of this occurred in 1975 when the magnificent filly, Ruffian, broke her leg in a match race at New York’s Belmont Park. She was treated by a team of four veterinarians and an orthopedic surgeon. During recovery from anesthesia she struggled desperately and destroyed the fixation device that had been applied. A decision for euthanasia was made 8 h after the race.


Analgesic Effect Pain Threshold Visceral Pain Morphine Sulfate Xylazine Hydrochloride 
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Copyright information

© American Physiological Society 1983

Authors and Affiliations

  • William V. Lumb
    • 1
  • Ney L. Pippi
    • 2
  • Marissak Kalpravidh
    • 3
  1. 1.Department of Clinical Sciences, College of Veterinary Medicine and Biomedical SciencesColorado State UniversityFort CollinsUSA
  2. 2.Escola de VeterinariaUniversidade Federal de Santa MariaRio Grande do SulBrazil
  3. 3.Faculty of Veterinary Sciences, Department of SurgeryChulalongkorn UniversityBangkokThailand

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