Carafate (sucralfate) is not available over the counter in the United States. It is a prescription-only medication, as confirmed by the FDA’s labeling, which marks it “Rx Only.” You will need a prescription from a healthcare provider to obtain either the brand-name Carafate or its generic form, sucralfate, in both tablet and liquid suspension versions.
What Carafate Does
Carafate works differently from most stomach medications you can buy at a drugstore. Rather than reducing acid production, it forms a protective barrier over damaged tissue in the stomach and upper intestine. When the medication reaches an ulcer or irritated area, it binds to the exposed tissue and creates a paste-like coating that shields it from stomach acid, digestive enzymes, and bile salts. This physical barrier gives the tissue time to heal.
Doctors prescribe it primarily for duodenal ulcers (ulcers in the first part of the small intestine), but it is also used off-label for gastritis and other conditions involving irritated stomach lining. A 2020 review noted that some researchers argue sucralfate should be considered even before acid-suppressing drugs, given its favorable safety profile and strong rates of gut healing.
Why It Requires a Prescription
Sucralfate can interfere with the absorption of other medications. It binds not just to damaged tissue but also to certain drugs in the digestive tract, reducing how much of those medications actually enters your bloodstream. This includes some antibiotics, heart medications, and thyroid drugs. Because of these interactions, a doctor needs to review your full medication list before prescribing it and set appropriate timing between doses.
Sucralfate also contains aluminum, which can accumulate in people with kidney problems. For patients with reduced kidney function, the risk of aluminum toxicity makes medical supervision important.
How It’s Taken
Sucralfate needs to be taken on an empty stomach, either one hour before meals or two hours after. This timing matters because food in the stomach can interfere with the medication’s ability to bind to damaged tissue. Most prescriptions call for multiple doses throughout the day during active treatment, with a reduced schedule for maintenance once healing has occurred.
The liquid suspension form should be shaken well before each dose to distribute the medication evenly. The tablet form can be swallowed whole or dissolved in water.
Common Side Effects
Sucralfate is generally well tolerated. Constipation is the most frequently reported side effect, likely because of the aluminum content. Less common effects include bloating, gas, nausea, dizziness, headache, and trouble sleeping. Serious reactions are rare but can include difficulty swallowing or breathing, which would need immediate medical attention.
OTC Alternatives for Stomach Issues
If you’re looking for stomach protection without a prescription, several over-the-counter options exist, though none work exactly the same way as Carafate.
- Antacids (calcium carbonate, magnesium hydroxide) neutralize existing stomach acid and provide quick, short-term relief but don’t form a protective barrier over damaged tissue.
- H2 blockers (famotidine) reduce acid production for several hours and are available OTC. They help prevent further irritation but don’t actively coat or protect existing damage.
- Proton pump inhibitors (omeprazole, esomeprazole) are the strongest OTC acid reducers. They block acid production at its source and are commonly used for ulcers and gastritis, though they typically need one to four days to reach full effect.
- Bismuth subsalicylate (Pepto-Bismol) provides some coating action and has mild antibacterial properties. It’s the closest OTC option to Carafate’s barrier-forming approach, but the coating effect is less targeted and shorter-lasting.
These products manage acid and symptoms effectively for many people with heartburn, mild gastritis, or occasional stomach irritation. But if your doctor has specifically recommended Carafate, it’s typically because your condition benefits from that direct tissue-coating mechanism, something the OTC options don’t fully replicate.