My doctor and the specialty pharmacist said the the calcium carbonate based
antacids are fine to take. I have not researched the content of all
antacids, but the ones I take are the chewable calcium carbonate based antacids (they look like TUMs) Read the label to be sure the ingredient is calcium carbonate. As a precaution, I did not take them close to my medication times although I was told it was okay. (I like to be on the safe side, lol.