Sucralfate (brand name Carafate) is a coating medicine. It sticks to sore, damaged spots in a dog's esophagus, stomach and upper small intestine and shields them while they heal. It doesn't reduce acid production, and it isn't approved for dogs, so your veterinarian decides whether your dog needs it and how much.
If your dog just came home with a bottle of big pink tablets, two rules matter most. Give it only at the dose your vet set. And give any other medicine at least 2 hours before the sucralfate, because sucralfate can bind other drugs in the gut and stop them from being absorbed.
What Is Sucralfate for Dogs?
Sucralfate is a gastroprotectant, a drug that protects the lining of the gut. Chemically it's a salt of sucrose octasulfate (a sugar compound) and aluminum hydroxide. In the US it's sold as Carafate and as generic sucralfate; Sulcrate and Antepsin are names used elsewhere.
The FDA approved it for people, for short-term treatment of duodenal ulcers (ulcers in the first part of the small intestine). In dogs it's used extra-label: the vet prescribes a human drug for a use its label doesn't cover. That's common and legal, but the directions on the human package don't apply to your dog. Your vet's do.
How Does Sucralfate Work in Dogs?
In stomach acid, sucralfate turns into a thick, sticky paste. An ulcer or erosion is full of exposed protein from damaged cells, and sucralfate binds tightly to that protein. The result works a lot like a bandage over the sore spot.
According to the ACVIM consensus statement on gut protectants and the Merck Veterinary Manual, it also:
- blocks pepsin, the stomach enzyme that digests protein (including damaged tissue);
- encourages the lining to make more protective mucus and bicarbonate;
- may buffer acid in the esophagus.
What it doesn't do is switch off acid production. That's the job of acid reducers such as omeprazole (a proton pump inhibitor, or PPI) and famotidine (an H2 blocker). Vets sometimes prescribe sucralfate alongside one of them.
What Is Sucralfate Used for in Dogs?
VCA Animal Hospitals lists ulcers and erosions of the mouth, esophagus, stomach and small intestine as the main reasons vets prescribe it. That usually means one of two problems.
Stomach and intestinal ulcers
The Merck Veterinary Manual names NSAID pain medicines (such as carprofen, sold as Rimadyl), cancer and liver disease as the most commonly reported causes of stomach and duodenal ulcers in dogs.
Signs are often vague: vomiting, not eating, belly pain and weight loss. Some dogs vomit blood or pass black, tarry stool (melena, which is digested blood). Some show no signs at all.
Esophagitis
Esophagitis is inflammation of the esophagus, the tube between mouth and stomach. Merck links it mostly to stomach acid washing back up during anesthesia, and also to repeated vomiting, swallowed irritants and certain drugs such as doxycycline. Merck says a sucralfate slurry (a crushed tablet stirred into water) may be given to protect the esophagus.
Watch for regurgitation (food coming back up without the heaving of vomiting), drooling, repeated swallowing, pain, poor appetite and stretching out the head and neck.
What the evidence says
Most owner pages skip this part. In 2018, veterinary internal medicine specialists reviewed the evidence for gut protectants in dogs and cats (the ACVIM consensus statement) and concluded:
- For ulcers, PPIs come first. PPIs such as omeprazole are superior to sucralfate and should be the standard medical treatment for stomach and duodenal ulcers and erosions.
- No proven bonus from combining. No evidence shows a benefit (or a harmful interaction) from giving sucralfate with a PPI or an H2 blocker. Merck agrees that there's no evidence sucralfate adds anything to PPI therapy.
- Weak evidence for the esophagus. It may help protect an injured esophagus.
- No proven help with steroids. No clinical evidence shows that gut protectants, sucralfate included, prevent stomach problems from high doses of corticosteroids.
None of that makes sucralfate useless. It's a safe drug with a real protective action, and your vet may want it for a reason specific to your dog. It's just rarely the whole plan, and it never replaces finding out why the ulcer formed.
Sucralfate Dosage Chart for Dogs
For information only. These are typical published dose ranges, not a prescription and not medically verified for your pet. Your veterinarian sets the dose after examining your pet. Never start, stop or change a medicine without their OK.
Species | Use | Amount per dose | How often | Route | Source |
|---|---|---|---|---|---|
Dog | Ulcers and erosions of the stomach and upper small intestine | 0.5 to 1 g (500 to 1,000 mg) per dog, not per pound | every 8 to 12 hours (Merck ulcer chapter) or every 6 to 8 hours (Merck drug table) | by mouth, on an empty stomach | Merck Veterinary Manual: Gastrointestinal Ulcers in Small Animals (every 8 to 12 hours); Merck Veterinary Manual: Antiulcerative Drugs table (every 6 to 8 hours) |
Dose calculator · Sucralfate
Sucralfate dose calculator for dogs
Not a prescription. For information only. These are typical published dose ranges, not a prescription and not medically verified for your pet. Your veterinarian sets the dose after examining your pet. Never start, stop or change a medicine without their OK.
Only give what your vet prescribed.
All doses in this calculator
| Pet | Use | Typical dose | How often | Route | Source |
|---|---|---|---|---|---|
| Dog | Ulcers and erosions of the stomach and upper small intestine | 0 to 100 kg (0 to 220.5 lb): 0.5 to 1 g (500 to 1,000 mg) per dog, not per poundExtra-label use: your vet decides. Merck lists an amount per dog, not per pound, so it is the same at any weight; your vet picks where your dog falls in the range. Merck's Gastrointestinal Ulcers chapter says every 8 to 12 hours; its Antiulcerative Drugs table says every 6 to 8 hours. Give other medicines at least 2 hours before sucralfate. | every 8 to 12 hours (Merck ulcer chapter) or every 6 to 8 hours (Merck drug table) | by mouth, on an empty stomach | Merck Veterinary Manual: Gastrointestinal Ulcers in Small Animals; Antiulcerative Drugs table |
Only give what your vet prescribed, at the dose they set.
What the numbers don't tell you:
- It's a per-dog amount. Merck lists sucralfate per dog, not per pound or kilogram, so the range is the same at any weight. Your vet decides where your dog falls in it.
- The two Merck pages differ on how often. Your vet picks the one that fits your dog.
- There's no separate esophagitis dose. Merck only notes that a slurry may be used to protect the esophagus.
- Carafate tablets are 1 g and made for people. Your vet will tell you whether your dog gets a whole tablet, part of one, or a measured amount of liquid.
- Not for every dog. Never give it to a dog that has reacted to sucralfate before; see the cautions below.
- Too much, or got into the bottle? Call your vet, the ASPCA Animal Poison Control Center at (888) 426-4435 or the Pet Poison Helpline at (855) 764-7661 now. Serious overdose problems are unlikely, since very little of the drug is absorbed, but a professional should check your dog.
When to Give Sucralfate: A Simple Daily Schedule
Sucralfate grabs onto more than ulcers. It can also bind other medicines and food, so timing matters as much as the dose. Each round looks like this:
Step | What to do | Why |
|---|---|---|
1 | Give your dog's other medicines first | Sucralfate can bind them if they meet in the gut |
2 | Wait at least 2 hours | Giving the other drug 2 hours before sucralfate removed the interaction in studies cited on the Carafate label and by ACVIM |
3 | Give sucralfate on an empty stomach | Food gets in the way of the coating |
4 | Wait 1 to 2 hours before feeding | Merck advises keeping it separate from food and other drugs by 1 to 2 hours |
A few practical notes:
- Your vet's schedule wins. Merck allows 1 to 2 hours before or after other drugs. If two medicines clash on your dog's timetable, ask the clinic to lay out the day for you.
- Keep antacids 30 minutes away. The human label says antacids shouldn't be given within half an hour before or after sucralfate. Don't add one your vet didn't prescribe.
- Omeprazole and famotidine are not antacids. They lower acid production rather than neutralizing acid. ACVIM found no evidence that combining them with sucralfate helps or hurts, so follow the order your vet chose.
- Write it down. A note on the fridge or a pill organizer with times makes the routine easier on a busy day.
How to Give Sucralfate to Your Dog
Sucralfate comes as a large tablet (Carafate tablets are light pink and oblong) and as a liquid suspension.
Why vets often ask for a slurry
A whole tablet slides past the esophagus without coating it. Intact tablets may not break down properly in dogs at all: in one study, sucralfate tablets had no effect on how well dogs absorbed doxycycline, while the liquid did. The ACVIM panel read that as a sign the tablets didn't dissolve and suggested giving dogs a suspension rather than an intact tablet.
How to make a sucralfate slurry
- Just before you give it, crush the tablet (or the part your vet prescribed) and stir it into a small amount of lukewarm water.
- Draw it into an oral syringe from your vet or pharmacy.
- Slip the tip into the pouch between your dog's cheek and back teeth and push the plunger slowly, so your dog can swallow as you go.
- Never squirt it fast toward the throat. It can go down the wrong way; the human label even reports tablets being inhaled by people who had trouble swallowing.
Can you crush sucralfate for dogs?
Yes. VCA recommends crushing tablets and dissolving them in water. Just don't hide the powder in food: sucralfate needs an empty stomach.
Can I dissolve sucralfate in water?
Yes, in a small amount, as above. Not in the water bowl, though: you'd have no idea how much your dog actually drank.
Sucralfate for Dogs: Side Effects
ACVIM calls sucralfate a relatively safe drug with minimal side effects. VCA and the human label list:
- constipation, the most common one (about 2% of people in label trials), caused by the aluminum
- vomiting (more often in cats)
- allergic reactions, which are rare: irregular breathing, rash, fever or a puffy face
Call your vet about any of these, and right away for breathing trouble or facial swelling.
Which dogs need extra caution?
- Dogs with kidney disease. A little aluminum is absorbed from the gut, and weak kidneys can't clear it. ACVIM advises caution with long-term use in kidney insufficiency, so if your dog has kidney disease, tell your vet about every aluminum-containing product, antacids included.
- Dogs that are constipated or prone to it.
- Pregnant or nursing dogs, since safety hasn't been established.
- Dogs with diabetes. VCA notes that sucralfate raised blood sugar in some diabetic people; whether that happens in dogs isn't known.
Sucralfate drug interactions
Given at the same time, sucralfate lowers the absorption of many drugs. ACVIM and the Carafate label name these, among others that dogs may take:
- tetracycline antibiotics: doxycycline, minocycline and tetracycline
- ciprofloxacin
- digoxin (a heart medicine)
- levothyroxine (thyroid hormone)
- ketoconazole (an antifungal)
- phenytoin (an anti-seizure drug)
One dog study found no meaningful effect on enrofloxacin (Baytril). The 2-hour rule above covers all of these. Tell your vet about every medicine, supplement and vitamin your dog gets.
How Long Does Sucralfate Take to Work?
It starts working within 1 to 2 hours, according to VCA, but visible improvement can take up to a few weeks. If it's given to prevent a problem, there's nothing to see at all. If your dog's signs get worse or don't improve, call your vet.
How long can my dog take sucralfate?
As long as your vet says. The "up to 8 weeks" figure online comes from the human label for duodenal ulcers, not from dog studies.
What if I miss a dose?
Give it when you remember, unless the next dose is almost due: then skip the missed one. Never give two doses at once (VCA).
How should I store it?
At room temperature, away from light. Don't freeze the liquid, and follow the label on any compounded product.
When to Call Your Vet Now
A coating can't fix a bleeding or deepening ulcer. VCA advises contacting your vet if you see blood in the stool or vomit, from bright red to black, because the ulcers may be getting worse.
Call your vet or an emergency clinic now if your dog has:
- black, tarry stool, or blood in the vomit
- pale gums
- weakness or collapse
- severe belly pain
- trouble breathing or a swollen face after a dose
Book a visit soon if your dog keeps vomiting, is eating less, losing weight, regurgitating, drooling more than usual, or seems constipated on the medicine.
Sucralfate for Cats
Cats get sucralfate too, at smaller amounts, and vomiting is a more common side effect in cats. Our guide to sucralfate for cats covers the details. Never give a cat a dog's prescription.
The Bottom Line
Sucralfate protects damaged gut lining while your vet treats the real cause. Most mistakes happen with timing, not the tablet: other medicines at least 2 hours first, then sucralfate on an empty stomach. Before you leave the clinic, ask your vet to write that schedule down.
Originally written by Dr. Catharina Hjorth. Updated by the I Love Veterinary editorial team.
Sources
- Merck Veterinary Manual: Gastrointestinal Ulcers in Small Animals
- Merck Veterinary Manual: Table, Antiulcerative Drugs
- Merck Veterinary Manual: Esophagitis in Small Animals
- Marks SL, Kook PH, Papich MG, Tolbert MK, Willard MD. ACVIM consensus statement: Support for rational administration of gastrointestinal protectants to dogs and cats. J Vet Intern Med. 2018;32:1823-1840
- DailyMed: Carafate (sucralfate) tablets, prescribing information
- VCA Animal Hospitals: Sucralfate
- ASPCA Animal Poison Control Center
- Pet Poison Helpline
This article is for general information and is not a substitute for advice from your veterinarian.
