Gaviscon double action mint is a combination of two antacids and an alginate and works in two ways 1 neutralising excess stomach acid to relieve pain and discomfort 2 forming a protective barrier over the stomach contents to soothe the burning pain in your chest gaviscon double action mint is used for the treatment of symptoms of gastro oesophageal reflux such as acid regurgitation heartburn and indigestionwhich may occur for example following meals or during pregnancy and symptoms of exc