Fast powerful reliefheartburn ampamp indigestionextra strength formulalong lastinggaviscon advance provides fast soothing and long lasting relief from the pain and discomfort of heartburn and acid indigestion which for example can occur after meals or during pregnancythe product belongs to a group of medicines called reflux suppressants which form a protective layer on top of the stomach contents to prevent acid escaping from the stomach where it works into the food pipe where it hurts