Pituitary Pars Intermedia Dysfunction is one of the most common diseases of the endocrine system that can affect horses.1 PPID causes the horse's pituitary gland, which utilizes hormones to control body functions, to work overtime. This can lead to a variety of problems for horses, ranging from unexplained laminitis to abnormal fat deposits. PPID affects both male and female horses, all breeds and horses as young as 5 years of age.2
Signs of PPID vary widely and may be mild or severe. Often early clinical signs can
go unrecognized. Below is a check list of both early and advanced signs of PPID. If you notice
any of these signs in your horse, check with your veterinarian.
PPID is seen in all breeds of horses including ponies. It also affects both male and female horses.
PPID affects horses of all ages but has been seen in horses as young as 5 years of age.2
Your veterinarian will examine your horse and determine if your horse should be tested for PPID. A blood test is often performed to determine if your horse is positive for the disease.
Pergolide mesylate is considered the gold standard for treatment of PPID. Prascend® (pergolide mesylate) is the only FDA-approved formulation of pergolide mesylate approved for use in horses.
No. There is currently no cure for PPID. It is a chronic, lifelong disease that requires daily medical treatment. However, treatment with PRASCEND can reduce clinical signs of the disease, improving the quality of life for the affected horse.
PRASCEND is for use in horses only. Treatment with PRASCEND may cause loss of
appetite. Most cases are mild. Weight loss, lack of energy, and behavioral changes also may be
observed. If severe, a temporary dose reduction may be necessary. PRASCEND has not been
evaluated in breeding, pregnant, or lactating horses and may interfere with reproductive
hormones in these horses. PRASCEND Tablets should not be crushed due to the potential for
increased human exposure. Refer to package insert for complete
1. McGowan TW, Hodgson DR, McGowan CM. The prevalence of equine Cushing's syndrome in aged
horses. In: Proceedings from the 25th American College of Veterinary Internal Medicine Forum;
June 6-9, 2007; Seattle, WA. Abstract 603.
2. Donaldson MT, McDonnell SM, Schanbacher BJ, Lamb SV, McFarlane D, Beech J. Variation in plasma adrenocorticotropic hormone concentration and dexamethasone suppression test results with season, age, and sex in healthy ponies and horses. J Vet Intern Med. 2005;19(2):217-222.