Sucralfate in Cats: Dosage Guidelines, Safety, and Potential Side Effects

Sucralfate is a gastrointestinal mucosal protectant that forms a protective coating over ulcerated tissue. Although it is not commonly prescribed for cats, understanding its mechanism, dosing, and safety is essential if your veterinarian recommends it.

Quick Overview

• Medication type: Gastrointestinal mucosal protectant
• Form: Tablet (usually dissolved in water and given as a slurry) or liquid suspension
• Prescription required: Yes
• Life stage: No specific restriction
• Brand names: Carafate, Sulcrate
• Available dosages: 1 g tablet, suspension 1 g/10 mL

What Is Sucralfate and How Does It Work?

Sucralfate is an aluminum‑sucrose salt that reacts with gastric hydrochloric acid to create a paste‑like coating. This coating adheres to proteinaceous material (fibrin) at ulcer sites, forming a barrier that protects the lesion from stomach acid and bile salts. Because it is minimally absorbed, its action is local to the esophagus, stomach, and duodenum.

Common causes of gastrointestinal ulcers in cats include chronic kidney disease, severe stress, NSAID toxicity, and neoplasia (e.g., lymphoma, adenocarcinoma, mast cell tumors).

Evidence of Efficacy

A 2018 ACVIM consensus statement found limited evidence that sucralfate provides a significant advantage over acid‑reducing drugs (e.g., omeprazole, famotidine) for treating gastroduodenal ulceration and erosion in cats. No clear benefit was demonstrated for esophagitis or for ulcer prophylaxis compared with misoprostol.

Veterinarians with extensive experience may still use sucralfate for suspected ulcers, provided they anticipate minimal adverse effects.

Dosing Information (Off‑Label Use)

Sucralfate is not FDA‑approved for cats and is used off‑label. Dosing must follow your veterinarian’s recommendation based on your cat’s condition.

• Typical dose range: ¼ to 1 whole 1 g tablet per administration (most cats receive ≤¼ tablet).
• Frequency: Every 6–8 hours.

How to Administer

Because the tablet is large and bitter, it should be dissolved before giving:

1. Crush the appropriate tablet portion in a small bowl.
2. Add 1–2 mL of water and mix until fully dissolved.
3. Draw the slurry into a syringe and administer directly into the mouth.

Optional: Mix a few drops of tuna juice into the water to improve palatability. Do not give with food—sucralfate must be administered on an empty stomach for optimal mucosal contact.

If using the liquid suspension (1 g/10 mL), administer approximately 2.5 mL to deliver a dose equivalent to ¼ of a 250 mg tablet.

Potential Side Effects

• Constipation (local effect)
• Vomiting – reported more often in cats than dogs
• Reduced appetite

Because of these effects, many clinicians prefer proton‑pump inhibitors for ulcer treatment. Sucralfate is contraindicated in cats with renal failure due to the risk of aluminum accumulation, which can worsen kidney values and GI signs.

Overdose and Emergency Management

Overdose primarily increases the risk of constipation, vomiting, and anorexia. Systemic toxicity has not been reported. If an overdose is suspected, contact your veterinarian or a poison control hotline immediately:

• ASPCA Animal Poison Control Center – 1‑888‑426‑4435
• Pet Poison Helpline – 1‑855‑764‑7661

Drug Interactions

Sucralfate can bind other oral medications, reducing their absorption. Administer other drugs at least 2 hours before or after sucralfate. Notable interactions include:

• Alendronate, calcium/magnesium antacids, and lanthanum – reduced absorption
• Aluminum‑containing antacids – additive aluminum load and decreased sucralfate efficacy
• Ciprofloxacin, doxycycline, macrolide antibiotics, ketoconazole, levothyroxine, penicillamine, tetracyclines – absorption affected
• Digoxin, furosemide, theophylline, fat‑soluble vitamins (K, E) – absorption affected
• Enteral feeding tubes – separate administration by ≥1 hour

Storage Guidelines

• Tablets: Store at room temperature (59–86 °F / 15–30 °C). Do not keep crushed tablets mixed with water longer than needed for administration.
• Liquid suspension: Store at 68–77 °F (20–25 °C).

References

1. A. Budde & J. McCluskey (2023). Sucralfate. In Plumb’s Veterinary Drug Handbook (10th ed.). Wiley‑Blackwell.
2. Marks et al. (2018). ACVIM consensus statement on gastrointestinal protectants. J. Vet. Intern. Med. 32(6):1823‑1840.
3. Forsythe & Gollakner. Sucralfate. VCA Animal Hospitals.
4. PubChem. Sucralfate.
5. Liptak et al. (2002). Gastroduodenal ulceration in cats: case series and literature review. J. Feline Med. Surg. 4(1):27‑42.