Gaviscon Double Action Tablets bring long lasting relief from the pain and discomfort of heartburn and acid indigestion. They get to work in two different ways: Neutralising excess stomach acid to relieve pain and discomfort (white layer) Forming a protective barrier over the stomach contents to soothe the burning pain in your chest (pink layer) The tablets do not contain sugar or gluten. You can take this product if you are pregnant or breast feeding. Please note that results may vary.