Gaviscon can relieve some gastritis symptoms like burning and discomfort, but it does not heal the inflamed stomach lining. It works primarily as a physical barrier and mild antacid, making it useful for short-term relief while you address the root cause of your gastritis. If your gastritis is caused by a bacterial infection or chronic irritation, you’ll need more targeted treatment to actually resolve it.
What Gaviscon Does in Your Stomach
Gaviscon’s active ingredient, sodium alginate, reacts with your stomach acid to form a gel-like raft that floats on top of your stomach contents. Carbon dioxide from bicarbonate gets trapped inside this gel, keeping it buoyant. The result is a physical barrier that sits between your stomach acid and the more vulnerable tissue above it. This barrier typically lasts about four hours per dose.
Most Gaviscon formulations also contain an antacid component (aluminum hydroxide or calcium carbonate) that neutralizes some existing acid on contact. This is what provides the quick relief from burning pain. But neutralizing acid is different from reducing acid production, which is what stronger medications like proton pump inhibitors (PPIs) do.
Why It Helps Symptoms but Not the Underlying Problem
Gastritis is inflammation of the stomach lining, and the causes range from bacterial infection to overuse of painkillers like ibuprofen, excessive alcohol, stress, or bile flowing backward into the stomach. Gaviscon addresses the symptom (acid irritating already-inflamed tissue) without resolving what caused the inflammation in the first place.
This is an important distinction. Antacids like Gaviscon, Maalox, and Tums all provide quick symptom relief by neutralizing existing acid, but none of them heal the underlying gastritis. Think of it like putting a bandage on a wound that keeps getting reopened. The bandage helps, but you need to stop whatever is causing the injury.
For gastritis caused by H. pylori bacteria, the standard treatment is a proton pump inhibitor combined with two or three antibiotics taken for 7 to 14 days. Gaviscon can’t replace any part of that regimen. For gastritis caused by NSAID painkillers, stopping the offending medication and using acid-reducing drugs gives the lining time to repair itself.
How Gaviscon Compares to Stronger Acid Medications
A head-to-head trial comparing Gaviscon to omeprazole (a common PPI) for heartburn found that both reached a 24-hour symptom-free period in an average of 2 days. However, by day 7, the omeprazole group had slightly more symptom-free days (3.7 versus 3.1). That study looked at reflux symptoms rather than gastritis healing specifically, but it illustrates the pattern: Gaviscon performs well for quick relief, while PPIs pull ahead over time because they reduce acid production at the source.
For mild, occasional gastritis flare-ups, Gaviscon may be all you need to get through the discomfort. For chronic or moderate-to-severe gastritis, PPIs or H2 blockers are more effective because they reduce the total volume of acid your stomach produces, giving the inflamed lining a real chance to heal.
Bile Reflux Gastritis
One scenario where Gaviscon may offer a specific advantage is bile reflux gastritis, where bile from the small intestine flows back into the stomach and irritates the lining. In experimental models, the alginate raft has been shown to inhibit the damaging effects of bile acids on mucosal tissue. Standard acid-reducing medications don’t target bile, so Gaviscon’s physical barrier approach addresses a different piece of the problem. It still won’t heal existing inflammation on its own, but it can reduce ongoing irritation from bile exposure.
When and How to Take It
The best time to take Gaviscon is after meals and at bedtime. Gastritis pain and discomfort tend to be worse at these times because eating stimulates acid production, and lying down allows acid to contact more of the stomach lining. Taking it after food means the alginate raft forms on top of a full stomach, maximizing coverage. Each dose lasts roughly four hours.
Risks of Using Gaviscon Long Term
For occasional, short-term use, Gaviscon is well tolerated. The risks increase if you rely on it daily for weeks or months, which some people do when they treat gastritis symptoms without addressing the cause.
Formulations containing aluminum hydroxide can lead to low phosphate levels over time. Chronic phosphate depletion weakens bones and can eventually cause a condition called osteomalacia, where bones become soft and prone to fracture. Aluminum itself can accumulate in the body, depositing in bones, joints, and brain tissue. This is primarily a concern for people with kidney problems, who can’t efficiently clear aluminum or magnesium from their system.
Gaviscon also contains sodium, with regular-strength liquid delivering about 52 mg per tablespoon. That’s a modest amount, but it adds up across multiple daily doses if you’re on a sodium-restricted diet for blood pressure management. The extra-strength version contains less, around 11 mg per teaspoon.
If you find yourself reaching for Gaviscon daily for more than two weeks, that’s a signal your gastritis needs a different approach. The relief you’re getting is real, but it’s masking a problem that could be diagnosed and treated more effectively.