GAVISCON Double Strength 60 Tabs : Gaviscon Double Strength Heartburn Relief Peppermint Chewable Tablets 60s -Fast acting, soothing and lasts 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 ) Active Ingredient Sodium Alginate 500mg, Calcium Carbonate 160mg and Sodium Bicarbonate 267mg DOSAGE Adults and children over 12 years: Take 1-2 tablets as required after meals and before going to bed, up to four times daily or as directed.