GastroGard Item# 10042

GastroGard Rx

GastroGard Oral paste for treatment and prevention of recurrence of gastric ulcers in horses and foal 4 weeks of age and older. GastroGard for treatment, administer orally once daily for 4 weeks at the rate of one tube per 1250 lbs. of body weight. Price is per Tube

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What is GastroGard?

GastroGard is used for treatment and prevention of gastric ulcers in horses and foals 4 weeks of age and older and weight starting at 600. This paste should be administered orally once-a-day for 4 weeks or at the recommended dosageby your vet.The dosage will change for horses weighing over 1200 pounds.

Who is GastroGard for?

GastroGard, a cinnamon flavored, Paste is recommended for oral use in horses. This product may be used in breeding stallions, but its safety has not been determined in breeding or lactating mares.

Why use GastroGard?

Gastrogard is used orally for the treatment and recurrence of gastric/stomach ulcers in horses and foals 4 weeks of age and older.

How GastroGard work?

GASTROGARD acts at the source of acid production, which works for a short period of time by neutralizing acid within the stomach lumen or acting at the mucous barrier. GASTROGARD inhibits the proton pump that produces stomach acid. It blocks the secretion of gastric acid regardless of the cause.

Generic Brands:

Omeprazole (Lomac Equine)



Active ingredient(s):


How is GastroGard sold?

For veterinary use only

What special precautions are there?

Gastrogard is for use in healthy horses. It is for use safely in stallions, but should not be used in horses that are intended for human consumption.

What to do if overdose?

In case of adverse reaction, consult your nearest animal hospital.

How can I store GastroGard?

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

GastroGard (omeprazole) Paste for horses contains 37% w/w omeprazole and is available in an adjustable-dose syringe. Each syringe contains 2.28 g of omeprazole. Syringes are calibrated according to body weight and are available in boxes of 14 units, 28 units or 72 units.  

GastroGard Paste for horses is recommended for use in horses and foals 4 weeks of age and older.

For treatment of gastric ulcers, each weight marking on the syringe plunger will deliver sufficient 250 lbs.

For prevention of recurrence of gastric ulcers, each weight marking will deliver sufficient to dose 500 lbs body weight.

To deliver GastroGard Paste at the treatment dose rate set the syringe plunger to the appropriate weight marking according to the horse’s weight in pounds.

To deliver GastroGard Paste at the dose rate to prevent recurrence of ulcers, set the syringe plunger to the weight marking corresponding to half of the horse’s weight in pounds.  Make sure the horse’s mouth does not contain food.

1. Remove the cover from the tip of the syringe, and insert the syringe into the horse’s mouth at a space between the teeth.
2. 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, once a day for up to28 days. 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, redosing is recommended. After dosing, if the syringe is not completely empty, it may be reused on following days until emptied. Replace the cap after each use.


 may be one of the most common conditions a horse can develop, 60 to 90 percent of show and race horses will develop the illness. And horses with a more nervous disposition are bound to have ulcers compared to a calmer and easy going horse. Because there are various causes to equine gastric ulcers we may want to start to understand a little more of how a horse digestive system may work. We as humans stimulate what is called hydrochloric acid when we eat; this is found in our gastric juices to help aid digestion and protect the stomach against the effects of enzymes and acid. The same production is found in horses but unlike humans they do not just develop hydrochloric acid when they eat, but it is constantly being produced. If a horse does not eat, acid builds up in the stomach which will start to irritate the stomach eventually leading to more serious problems.
We can start to understand that frequent small meals are required in order to keep the stomach from being empty and causing a less damaging effect on the horses stomach. Such feedings of roughage, the amount and types can also play a role in preventing the increase of stomach acid. The horse’s chewing produces more saliva and by the horse swallowing the saliva helps neutralize stomach acid. Also certain types of medications that may increase the risk of ulcers may be those containing NSAIDS anti-inflammatory or any other medication that may block the production of prostaglandin E2 also known as PgE2 which is a chemical that decreases the acid production therefore when there is a low amount of PgE2 levels in the stomach there is a higher level of acid which lead to ulcers developing.

You may want to look out for symptoms in order to take the right action towards treating equine gastric ulcers. Symptoms vary between foals and a adult horse. The following symptoms may be a red flag of a problem

  •         COLIC EPISODES
  •         DIARRHEA
  •          TEETH GRINDING
  •          POOR HAIR COAT


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