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Gaviscon Advance contains double the sodium alginate of Gaviscon Original, making it the strongest in the range. It reacts with stomach acid to form a thick, raft-like layer that sits on top of the stomach contents, preventing acid from rising into the oesophagus. At the same time, antacids like potassium bicarbonate and calcium carbonate neutralize excess acid, providing fast relief. Unlike acid suppressants, it doesn’t affect natural acid production.
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Gaviscon Advance (liquid)
Antacids
Yes
Sodium Alginate and Potassium Hydrogen Carbonate
A few minutes after use
Gaviscon Advance contains double the sodium alginate of Gaviscon Original, making it the strongest in the range. It reacts with stomach acid to form a thick, raft-like layer that sits on top of the stomach contents, preventing acid from rising into the oesophagus. At the same time, antacids like potassium bicarbonate and calcium carbonate neutralize excess acid, providing fast relief. Unlike acid suppressants, it doesn’t affect natural acid production.
Rarely allergic reactions (symptoms include skin rash, itching, breathing difficulties) Uncommon diarrhoea, nausea and vomiting
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Excellent customer service from start to finish for registration.
I collected item in person from their London location, it was very easy to...
I really can't recommend Rightangled highly enough, they have everything spot on. Their price's are competitive and the added discounts on top are fantastic...
Never had a problem with this company. Always checking in to make sure my weight loss journey is on track. Pricing is competitive and postal spot on...
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2nd month with Rightangled and the reordering process is very quick and straightforward unlike other providers I have used in the past...
Using their services for more than a year and half. They are just great, any issues has been handled with kindness and professionalism. The order will arrive as expected in..
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Gaviscon Advance is a powerful reflux treatment designed to relieve heartburn and indigestion. With double the sodium alginate of the original formula, it forms a protective barrier that blocks stomach acid from rising, while antacids provide fast, soothing relief. Suitable for day or night use, it’s gentle on the stomach and free from sugar and gluten.
Medically reviewed and published
This page was medically reviewed by Dr Sohaib Imtiaz, Clinical Lead on Apr 11, 2026, 12:00 pm
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