Aspects of the present invention are directed to an oral antacid tablet comprising at least about 60% by weight directly compressible granulated calcium carbonate and an intense flavoring. The tablet may have a hardness of at least about 22 Strong-Cobb units and the tablet may have a mass of between about 500 mg and about 1,000 mg. Tablets of the present invention reduce or eliminate heartburn symptoms and also freshen breath.
