The original British version of "Gaviscon contains 'algaenate" which forms a top layer above the stomach acid which helps to keep it out of the esophagus. This will also allow other medications to be fully absorbed, since it doesn't totally coat the stomach lining. A Pharmacy in the U.K. had this product but could not ship the preferred "liquid" version into the U.S.-I would have to chew their tablet version instead of the flavored liquid version. I hope that some "Canadian Pharmacy" might be able to get & ship me the liquid version.