FDA Approves First Generic Omeprazole Oral Paste for Gastric Ulcers in Horses
April 6, 2026
The U.S. Food and Drug Administration has approved Gastrobim (omeprazole) oral paste for the treatment of gastric ulcers and prevention of gastric ulcer recurrence in horses and foals four weeks of age and older. Gastrobim is a proton pump inhibitor, a class of medications that act by blocking the pumps in the stomach lining that release stomach acid.
Gastrobim contains the same active ingredient (omeprazole) as the approved brand-name drug product, Gastrogard, which was approved in 1999. The FDA determined that Gastrobim is bioequivalent to the brand-name product.
Gastrobim is available only by prescription from a licensed veterinarian.
For the treatment of gastric ulcers, Gastrobim should be administered orally once a day for four weeks at the recommended dosage of 1.8 mg/lb. body weight (4 mg/kg). For the prevention of recurrence of gastric ulcers, continue treatment for at least an additional four weeks by administering Gastrobim at the recommended daily maintenance dose of 0.9 mg/lb. (2 mg/kg).
Gastrobim is sponsored by Bimeda Animal Health Ltd. of Ireland.
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