GastroGard (Omeprazole) Gastric Ulcer Oral Paste Horse Treatment, 1 syringe, 2.28 g syringe, slide 1 of 1

GastroGard (Omeprazole) Oral Paste for Horses, 2.28 g, 1 Syringe

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As a horse parent, you know that stomach and digestive issues can lead to potentially dangerous—even life-threatening—problems for your horse. GastroGuard Oral Paste for Horses is a safe and effective way to help treat, and prevent, a recurrence of gastric ulcers in horses and foals over the age of four weeks. GASTROGARD works to reduce the amount of acid in the horse’s stomach thereby increasing the gastric pH to allow ulcers to heal. An FDA-approved paste, GastroGuard Oral Paste for Horses comes with an easy-to-use syringe, making for a quick and clean way to administer it orally to your horse. Keeping your equine friend free of ulcers is a number one way to keep her safe, happy and healthy.

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To aid in improving, healing and preventing the occurrence and recurrence of gastric ulcers, in horses and foals nine weeks of age and older. One dose lasts 24 hours making it easy to administer

Possible Side Effects

To read more about possible side effects, please review the package insert.

Drug & Food Interactions

Pease consult with your veterinarian for any Food and Drug interaction concerns.


The safety of GASTROGARD (omeprazole) Paste has not been determined in pregnant or lactating mares.

  1. Prescribing Information

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Recommended Dosage

For treatment of equine gastric ulcers, GASTROGARD (omeprazole) should be administered orally once-a day for 4 weeks at the recommended dosage of 1.8 mg omeprazole/lb body weight (4 mg/kg). For the prevention of recurrence of gastric ulcers, continue treatment for at least an additional 4 weeks by administering GASTROGARD at the recommended daily maintenance dose of 0.9 mg/lb (2 mg/kg). GASTROGARD is recommended for use in horses and foals 4 weeks of age and older. The contents of one syringe will dose a 1250 lb (568 kg) horse at the rate of 1.8 mg omeprazole/lb body weight (4 mg/kg). For treatment of gastric ulcers, each weight marking on the syringe plunger will deliver sufficient omeprazole to treat 250 lb (114 kg) body weight. For prevention of recurrence of gastric ulcers, each weight marking will deliver sufficient omeprazole to dose 500 lb (227 kg) body weight. To deliver GASTROGARD at the treatment dose rate of 1.8 mg omeprazole/lb body weight (4 mg/kg), set the syringe plunger to the appropriate weight marking according to the horses weight in pounds. To deliver GASTROGARD at the dose rate of 0.9 mg/lb (2 mg/kg) to prevent recurrence of ulcers, set the syringe plunger to the weight marking corresponding to half of the horses weight in pounds. To set the syringe plunger: 1) While holding plunger, turn the knurled ring on the plunger to the left and slide the knurled ring along the plunger shaft so that the side nearest the barrel is at the appropriate weight marking, aligning the arrows on the ring and plunger. 2) Lock the ring in place by making turns to the right. Ensure it is locked. Make sure the horses mouth contains no feed. Remove the cover from the tip of the syringe, and insert the syringe into the horses mouth at the interdental space. Depress the plunger until stopped by the knurled ring. The dose should be deposited on the back of the tongue or deep into the cheek pouch. Care should be taken to ensure that the horse consumes the complete dose. Treated animals should be observed briefly after administration to ensure that part of the dose is not lost or rejected. If any of the dose is lost, re-dosing is recommended. If, after dosing, the syringe is not completely empty, it may be reused on following days until emptied. Replace the cap after each use.

Storage Instructions

Store at 68 F-77 F (20-25 C). Excursions between 59 F-86 F (15-30 C) are permitted.


How is this medication useful?

Omeprazole is a medication that is used to prevent and/or treat stomach ulcers. The FDA (U.S. Food & Drug Administration) has approved this drug for use in horses and humans. The FDA allows veterinarians to prescribe and use products containing this drug in other animal species in certain situations. You and your veterinarian can discuss why this drug is the most appropriate choice.

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