In Each Chewable Tablet Other Information: Each Chewable Tablet Contains: calcium 300 mg, sodium 1 mg. Contains FD&C Yellow No. 5 (tartrazine) as a color additive. Store at room temperature. Avoid humidity. Close cap tightly after use. Calcium carbonate / antacid. Starts neutralizing acid in seconds! Heartburn reliefchews. Paraben free. Questions or comments? 1-800-986-0369.