There was a posting some time ago that stuck in my mind. Someone in the group taking prevacid said that their doctor told them that long term use of prevacid could cause cancer. Then in another posting they said their doctor said that it would be safe to take.I have been taking prevacid for about a year and a half. The prevacid seems to be causing me to have a lot of food intolerances that I didn't have before. The prevacid doesn't even work all the time for me but if I don't take it I have heartburn non-stop.Has anyone heard how safe prevacid is?Joanne