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GastroGard Oral Paste (Omeprazole)

Prescription medicineOnly Available By Prescription

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You'll have option to make 4 interest-free payments by credit card once your order is confirmed using

What if I find a lower price with another pharmacy?

We guarantee the lowest price on all of our prescription products. If you find your medications cheaper at any other recognized licensed mail order pharmacy, we will not only match their price, we will beat it by 25% of the difference. It is our 125% price match guarantee!

Example: If you find a product on Canada Drugs Direct for $50.00 and find the same product for $40.00 at another mail order pharmacy, we will provide you with a $12.50 discount, bringing your total to $37.50.

To get the discount please make sure to mention the price match to the customer service team when they call to collect payment for your order. Or call toll free at 1-888-904-8467 to place the order through the phone.

Terms & Conditions of Program

  • Guaranteed lowest price is only valid at the time of sale.
  • We will only match the current advertised price.
  • Products must be identical and in stock at the time of placing an order with a licensed mail order pharmacy. The must be a member of CIPA (Canadian International Pharmacy Association).
  • Products must be authentic in brand and size (same manufacturer, same country of manufacture, same pack size, same strength and same quantity).
  • Products must be new. We cannot match the price of any used, short expiry or expired product.
  • Price match can only be issued over the phone with our customer service team
What is a Generic Drug?

A generic drug is a copy of the brand-name drug with the same dosage, safety, strength, quality, consumption method, performance, and intended use. Before generics become available on the market, the generic company must prove it has the same active ingredients as the brand-name drug and works in the same way and in the same amount of time in the body.

The only differences between generics and their brand-name counterparts is that generics are less expensive and may look slightly different (eg. different shape or color), as trademarks laws prevent a generic from looking exactly like the brand-name drug.

Generics are less expensive because generic manufacturers don't have to invest large sums of money to develop a drug. When the brand-name patent expires, generic companies can manufacture a copy of the brand-name and sell it at a substantial discount.


Gastrogard is a prescription medication that treats ulcers in horses by reducing the amount of acid present in the horse's stomach to keep PH levels high so that and ulcers are able to heal. Gastrogard is a horse gastric ulcer treatment that may also be used preventively for animals that are prone to developing stomach ulcers. Omeprazole is in the proton pump inhibitor class of antacid medications, and is proven effective for reducing the horse's stomach acidity. Gastrogard is among the most common EGUS treatment medications for horses.

You can buy Gastrogard with a veterinarian's prescription, and your lowest Gastrogard price on it will be when you order pet medication online from Canada Drugs Direct.


Horse gastric ulcer treatment: Gastrogard paste will be applied orally 1x per day for 4 weeks. Standard dosage is one tube per 1250 pounds of body weight

Horse gastric ulcer prevention: Gastrogard paste is usually applied orally with ½ tube per 1250 pounds of body weight over an additional 4 weeks

Medication must be applied only at the frequency and dosage indicated in your prescription


The active ingredient in Gastrogard for horses is Omeprazole


Equine (horse) use only

Horses may need to be weaned off Omeprazole to avoid chance of acid rebound

Increased hydration may be a need for some horses when using Gastrogard, and preferable that they eat an especially fibre-rich diet when undergoing treatment for horse gastric ulcers.


Negative drug interactions may occur between Gastrogard paste and other Rx medications, and NSAID anti inflammatory drugs in particular. Tell your veterinarian of all medications your horse is currently taking before receiving a prescription and proceeding to buy Gastrogard online.

Side Effects

Side effects from use of Gastrogard are possible, and some horses may have nauseas, diarrhea, or stomach upset. If Gastrogard side effects for horses are experienced you may want to discontinue use and talk to your veterinarian again about EGUS treatment for horses options.

IMPORTANT NOTE: The above information is intended to increase awareness of health information and does not suggest treatment or diagnosis. This information is not a substitute for individual medical attention and should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. See your health care professional for medical advice and treatment.

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