What Antacids Are Gluten Free?

What Antacids Are Gluten Free? Tums: This is the only brand-name antacid that makes a gluten-free claim. Tums tablets, which come in a wide variety of flavors and strengths, contain the active ingredient calcium carbonate and are considered gluten-free, according to the manufacturer. Are Tums gluten-free? Purpose: Antacid. All varieties of TUMS® Regular Strength product