Drug Action: How Antacids Work

Antacids are used to treat symptoms caused by acid in the digestive juices. This acid may inflame eroded areas in the layer of mucus that lines the stomach, irritating the stomach walls. Antacids are mild alkaline substances that are taken orally. They work by neutralizing acidity in the digestive juices, thereby allowing eroded areas in the mucus layer to recover.

Before drug

The digestive juices contain acid, which may inflame eroded areas in the mucus layer and irritate the stomach lining.

After drug

The antacid combines with some of the stomach acid and neutralizes it, reducing irritation of the stomach lining.

From the 2010 revision of the Complete Home Medical Guide © Dorling Kindersley Limited.

The subjects, conditions and treatments covered in this encyclopaedia are for information only and may not be covered by your insurance product should you make a claim.

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