Calcium Carbonate Oral Suspension (not USP) 1250mg Calcium Supplement Liquid By Roxane Labs It acts as both a calcium supplement for bone health and as an effective antacid for relief of common heartburn and sour stomach symptoms. Fast acting oral solution goes to work immediately. Features: For use in the prevention of calcium deficiency when needed or as directed by a physician. Use as an antacid, and treatment and prevention of calcium deficiency or hyperphosphatemia has been used to bind phosphate. Calcium Carbonate supplements are taken by individuals who are unable to get enough calcium in their regular diet or who have a need for more calcium. They are used to prevent or treat several conditions that may cause hypocalcemia. The body needs calcium to make strong bones.