GAVISCON Peppermint flavoured liquid suspension provides relief from heartburn and indigestion. It is fast acting, soothing and last up to 4 hours. Suitable for use during pregnancy and breast-feeding, if necessary, to relieve your heartburn symptoms. Effective at treating symptoms associated with more severe and frequent heartburn i.e., a burning pain in the chest and mild acid regurgitation. Contains naturally derived sodium alginate which forms a protective layer over the stomach contents to help prevent acid coming back up into the oesophagus (food pipe).