Description
What is Gaviscon Advance Peppermint Oral Suspension?
Gaviscon Advance Peppermint Oral Suspension is a clinically proven reflux suppressant that provides long-lasting relief from the symptoms of heartburn and acid indigestion. It contains two active ingredients – sodium alginate and potassium hydrogen carbonate – which form a strong protective barrier (or “raft”) over stomach contents, helping to prevent acid from rising into the oesophagus.
This fast-acting suspension is peppermint-flavoured and sugar and gluten free, offering a soothing effect that helps neutralise acid and reduce discomfort after eating or before bed.
For more on acid reflux and heartburn, visit the NHS guide to heartburn and acid reflux.
What Gaviscon Advance Peppermint is used for
You may benefit from using Gaviscon Advance if you experience:
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A burning sensation in the chest (heartburn)
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An acidic or sour taste in the mouth
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Bloating, nausea or indigestion after meals
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Persistent cough or hoarseness caused by reflux
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Discomfort when lying down after eating
The product can also be used for reflux symptoms during pregnancy, under medical guidance.
How Gaviscon Advance works
When swallowed, Gaviscon Advance reacts with stomach acid to form a protective gel layer that floats on top of the stomach contents. This acts as a physical barrier, preventing acid from flowing back into the oesophagus – the main cause of heartburn.
Each 10 ml dose forms a raft that lasts up to four hours, providing prolonged relief without entering the bloodstream.
Active ingredients
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Sodium alginate (500 mg per 10 ml) – forms the protective barrier.
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Potassium hydrogen carbonate (100 mg per 10 ml) – neutralises excess acid.
Other ingredients
Calcium carbonate, carbomer, sodium hydroxide, parahydroxybenzoates (E218, E216), sodium saccharin, peppermint flavour, and purified water.
Free from: Sugar and gluten.
How to take Gaviscon Advance Oral Suspension
Dosage:
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Adults and children over 12 years:
Take 5-10 ml (one to two 5 ml spoonfuls) after meals and at bedtime. -
Children under 12 years:
Use only under medical advice.
Instructions:
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Shake the bottle well before use.
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Measure the correct dose using a medicine spoon or cup.
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Take after eating or before bed.
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Do not exceed the recommended dose or use for more than 7 days continuously without medical supervision.
Always read the patient information leaflet before use.
Who should not use Gaviscon Advance
Do not take this medicine if you are:
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Allergic to sodium alginate, potassium hydrogen carbonate, or any listed ingredient.
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Following a sodium or potassium restricted diet without medical approval.
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Experiencing severe kidney disease or low stomach acid.
Caution: Each maximum daily dose (40 ml) contains approximately 424 mg sodium, equivalent to 21% of the adult recommended daily intake. If you have high blood pressure, kidney problems or heart disease, consult your doctor before use.
Gaviscon Advance Liquid Side Effects
Most people experience no side effects when using Gaviscon Advance as directed. Rarely, allergic reactions may occur, causing:
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Rash, itching, or swelling
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Shortness of breath or dizziness
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Swelling of the face, lips, tongue, or throat
If these occur, stop taking the medicine and seek medical attention immediately.
Lifestyle tips for managing heartburn
Alongside Gaviscon Advance, simple lifestyle adjustments can help reduce reflux symptoms:
- Eat smaller, more frequent meals
- Avoid lying down within 3-4 hours after eating
- Limit spicy, fatty, or acidic foods
- Reduce alcohol and caffeine intake
- Stop smoking
- Elevate the head of your bed when sleeping
Storage instructions
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Keep out of sight and reach of children.
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Store below 30°C, in the original bottle.
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Use within 6 months of opening.
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Do not use after the expiry date printed on the packaging.
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Dispose of unused medicine safely – return it to your local pharmacy.
Frequently Asked Questions
Can I buy Gaviscon Advance over the counter?
Yes – it is classified as a Pharmacy (P) medicine, available without a prescription. A pharmacist may ask basic health questions to ensure it is suitable for you.
Can I take Gaviscon Advance with other medicines?
Speak to your doctor before taking Gaviscon if you use medications such as tetracyclines, iron salts, thyroid hormones, or bisphosphonates, as it can affect absorption. Leave at least 2 hours between taking these and Gaviscon.
Is Gaviscon Advance Peppermint safe during pregnancy?
Yes – Gaviscon Advance is often recommended for heartburn in pregnancy. However, consult your GP or midwife before first use.
Can I take Gaviscon Advance Oral Suspension every day?
Yes, short-term daily use is safe. If symptoms persist beyond 7 days, consult a healthcare professional.
What’s the difference between Gaviscon Original and Gaviscon Advance?
Gaviscon Advance contains double the concentration of sodium alginate, forming a thicker, longer-lasting protective layer compared to standard Gaviscon formulations.

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