Gaviscon Advance Peppermint flavour provides fast, soothing and long lasting relief from the pain and discomfort of heartburn and acid indigestion, which can occur after meals or during pregnancy, for example. The product belongs to a group of medicines called â€کreflux suppressantsâ€™, which form a protective layer on top of the stomach contents to prevent acid escaping from the stomach and leaking into the food pipe, where it hurts. â€¢ Peppermint flavour. â€¢ Fast powerful relief from heartburn and indigestion. â€¢ Extra strength formula. â€¢ Long lasting. â€¢ Sugar and Gluten free. â€¢ Can be taken if you are pregnant or breastfeeding.