Stomach ulcers can affect any horse.

Any horse can suffer from stomach ulcers – regardless of age, breed or discipline.1 They can be caused by everyday activities or by simply changing their routine.2 Even a weekend “fun” show is enough stress to cause stomach ulcers.3 With 2 out of 3 performance horses affected, odds are your horse is at risk.†,4

Common Stress Factors

  • Training and competition5
  • Trailering and travel5
  • Confinement or lay-up due to sickness or injury2
  • Limited turnout or grazing2
  • Changes in routine and social regrouping6
  • Weaning6
20 Horses – Free of Gastric Ulcers (confirmed by pre-study scoping)
10 Horses stayed at home 10 horses traveled to simulated event
  • Maintained normal feeding schedule
  • Maintained normal exercise routine
  • Trailered for four hours
  • Mild exercise twice daily
  • Fed oats and grass/alfalfa
All horses scoped at the end of the 5-day study
2 horses with stomach ulcers 7 horses with stomach ulcers

Clinical signs of stomach ulcers can be hard to spot. Your horse may not eat normally, may have a dull hair coat or may just not feel or look "right."6 Recurrent colic and less-than-optimal performance may also be signs.6 Foals may grind their teeth or lay on their backs.7 Only your veterinarian can accurately diagnose equine stomach ulcers.


See why equine stomach ulcers happen

Diagnosing Equine Stomach Ulcers

Endoscopy, or “scoping,” is a procedure that lets your veterinarian look inside your horse’s stomach via a tiny camera attached to a long, thin tube. Your veterinarian will place the endoscope in through the nostril, then down the esophagus and into the stomach. There, the lining can be examined for the presence of ulcers. If endoscopy is not practical, then a presumptive diagnosis may be made based on clinical signs, history and a physical examination.

What endoscopy reveals

IMPORTANT SAFETY INFORMATION: ULCERGARD can be used in horses that weigh at least 600 pounds. Safety in pregnant mares has not been determined.
CAUTION: Safety of GASTROGARD in pregnant or lactating mares has not been determined. For prescribing information click here.
*When administered for 8 or 28 days, ULCERGARD is proven to effectively prevent gastric ulcers in horses exposed to stressful conditions.
Non-racing, competitive horses
1 Data on file at Merial
2 Murray MJ. Disorders of the stomach. In: Smith BP, ed. Large Animal Internal Medicine . St. Louis; CV Mosby, 1990;710-777.
3 McClure SR, et al. Gastric ulcer development in horses in a simulated show or training environment. J Am Vet Med Assoc . 2005;227(5):775-777.
4 Mitchell RD. Prevalence of gastric ulcers in hunter/jumper and dressage horses evaluated for poor performance. Association for Equine Sports Medicine, September 2001.
5 ULCERGARD and GASTROGARD product labels.
6 Equine Gastric Ulcer Council. Recommendations for the diagnosis and treatment of Equine Gastric Ulcer Syndrome (EGUS). Equine Vet Educ . 1999;11:262-272.
7 Murray MJ. Diagnosing and treating gastric ulcers in foals and horses. Vet Med . 1991;820-827.
Share this site:
Official product of: