Fast Powerful Relief from heartburn & Indigestion. Gaviscon Double Action Liquid brings fast, soothing and long lasting relief from the pain and discomfort of heartburn and acid indigestion.It gets to work in two different 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. So, whenever you have symptoms of heartburn or indigestion Gaviscon Double Action can provide fast soothing relief.This product is sugar free and gluten-free.