Magnesium aluminium silicate

Antacid
ALSO SOLD WITHOUT PRESCRIPTION

Magnesium aluminium silicate is a antacid found in 1 medicine sold in India, such as Digene. Below: what it is for, how it works, how to take it, side effects, interactions and pregnancy advice.

What it is used for

Neutralises stomach acid.

How it works

A clay-like antacid that neutralises acid and coats the stomach, often in antacid gels with simethicone.

How to take it

Take after meals and at bedtime as directed. Keep 2 hours apart from other medicines.

Common side effects

Constipation or diarrhoea

Get medical help straight away if

Symptoms that keep coming back for more than 2 weeks

Be careful

Separate from other medicines by 2 hours.

Other medicines and interactions

Can reduce absorption of other medicines; take them 2 hours apart.

Pregnancy and breastfeeding

Short-term use is considered acceptable.

Combination medicines that contain Magnesium aluminium silicate (1)

Digene

Common questions

What is Magnesium aluminium silicate used for?

Neutralises stomach acid.

How does Magnesium aluminium silicate work?

A clay-like antacid that neutralises acid and coats the stomach, often in antacid gels with simethicone.

How should I take Magnesium aluminium silicate?

Take after meals and at bedtime as directed. Keep 2 hours apart from other medicines.

What are the side effects of Magnesium aluminium silicate?

Common: Constipation or diarrhoea. Get help straight away for: Symptoms that keep coming back for more than 2 weeks.

Does Magnesium aluminium silicate interact with other medicines?

Can reduce absorption of other medicines; take them 2 hours apart.

Is Magnesium aluminium silicate safe in pregnancy and breastfeeding?

Short-term use is considered acceptable.

Does Magnesium aluminium silicate need a prescription in India?

It is usually sold without a prescription in India, but ask a pharmacist if you take other medicines or have a long-term illness.

Which brands contain Magnesium aluminium silicate?

Digene.

Sources and further reading

NHS (UK National Health Service) and MedlinePlus (US National Library of Medicine) are free, reviewed medicine guides. Brand names and doses there may differ from India.

Last reviewed 31 October 2026. Written by Satya Babu from standard prescribing information.

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For information only, not medical advice. This page is a plain-language summary written from standard prescribing information and the public guides linked below. Brands sometimes change their formula, so always check the composition printed on the pack. Doses here are typical adult doses; yours may differ. Do not start, stop or change a medicine without your doctor or pharmacist, and keep all medicines away from children. In an emergency, call 112 (India) or your local emergency number.