Sucralfate for Horses: Uses, Dosing & Side Effects

This information is for educational purposes only. Never give your pet any medication without your veterinarian's guidance. Dosing, frequency, and safety depend on your pet's specific health profile.

Sucralfate is a prescription gastrointestinal protectant your vet may use in horses with suspected or confirmed ulcer disease. It is not an acid blocker. Instead, it reacts in the acidic stomach environment and forms a sticky protective barrier over damaged tissue. That coating can help shield irritated areas from acid, bile salts, and digestive enzymes while the tissue heals.

In horses, sucralfate is most often used as part of a broader ulcer plan rather than as a stand-alone answer. Merck notes that sucralfate binds to glandular gastric mucosa and may promote healing, but it has not shown good efficacy by itself for equine squamous gastric ulcer disease in horses or foals. Because of that, your vet may pair it with other medications and management changes based on where the ulcers are and how severe they appear.

Sucralfate is commonly dispensed as 1-gram tablets or as a compounded liquid or paste. For many horses, tablets are crushed and mixed with water into a slurry before oral dosing. PetMD notes it is generally given on an empty stomach and separated from other medications because it can interfere with absorption.

Your vet may prescribe sucralfate for horses with gastric ulcer disease, especially when glandular ulcers are suspected or confirmed. It is also sometimes used when there is concern for irritation or ulceration in the esophagus or upper digestive tract. In practice, it is often added when a horse has persistent discomfort, poor appetite, attitude changes around girthing or work, or incomplete response to acid-suppressing medication alone.

For equine gastric ulcer syndrome, sucralfate is usually considered an adjunct medication. Merck states that omeprazole is the FDA-approved treatment for equine gastric ulcer syndrome, while sucralfate may help protect glandular mucosa. PetMD also notes that some horses with gastric ulcers are prescribed sucralfate to coat ulcerated tissue.

Your vet may be more likely to use sucralfate in horses with suspected equine glandular gastric disease, NSAID-associated gastrointestinal irritation, or cases where extra mucosal protection is desired. It can also be part of a stepwise plan that includes diet changes, more forage access, reduced fasting time, and adjustments to training, travel, or stall confinement.

Always follow your vet's instructions, because equine dosing plans vary by diagnosis, body weight, formulation, and whether sucralfate is being used alone or with other ulcer medications. Merck's antiulcerative drug table lists a horse dose of 4 mg/kg by mouth every 24 hours for treatment and 2 mg/kg by mouth every 24 hours to help prevent recurrence. In real-world equine practice, some veterinarians may use different schedules or compounded formulations depending on the ulcer location and clinical response.

Sucralfate is usually given by mouth as crushed tablets mixed with water or as a compounded suspension. PetMD advises giving it on an empty stomach and at least two hours apart from other medications. That timing matters because sucralfate can bind other drugs in the digestive tract and reduce how much is absorbed.

Do not change the dose, stop early, or combine it with over-the-counter ulcer products without checking with your vet. If you miss a dose, ask your vet how to handle it. In many cases, they will recommend giving it when remembered unless the next dose is close, then returning to the regular schedule without doubling up.

Sucralfate is generally well tolerated in many animal species, including horses, but side effects can still happen. PetMD lists the most common adverse effects as mild digestive upset such as constipation, vomiting, and drooling. In horses, pet parents may notice reduced manure output, mild appetite changes, or resistance to taking the medication if the slurry texture is unpleasant.

Because sucralfate contains aluminum, your vet may use extra caution in horses with significant kidney problems or in horses receiving many other oral medications. Serious reactions are uncommon, but you should contact your vet promptly if your horse seems more painful, stops eating, develops marked constipation, has worsening colic signs, or shows any new signs after starting the medication.

If your horse is being treated for ulcers and is not improving, that does not always mean the medication is causing a problem. It may mean the ulcer type is different than expected, the timing of doses is reducing effectiveness, or another condition is contributing. Your vet may recommend changing the plan, adding diagnostics, or adjusting feeding and management.

The biggest practical interaction with sucralfate is that it can bind other oral medications and reduce their absorption. That is why it is commonly spaced at least two hours away from other drugs. This matters for ulcer medications, antibiotics, and other oral prescriptions your horse may be taking.

If your horse is also receiving omeprazole, famotidine, ranitidine, NSAIDs such as phenylbutazone or flunixin meglumine, or oral antibiotics, tell your vet exactly when each medication is being given. Merck notes sucralfate may be indicated alongside acid-reducing therapy in some ulcer-related cases, but the schedule still needs to be planned carefully.

Do not assume supplements are interaction-free. Oral electrolytes, mineral products, and compounded pastes may also affect timing or tolerance. The safest approach is to give your vet a full list of medications, supplements, and feeds so they can build a schedule that fits your horse's routine and reduces the risk of poor absorption.