<prompt> Calcium carbonate is used forAntacidRenal stoneMetabolic alkalosisRenal failure  <response>: Ref: Katzungs, 14th ed. pg. 1089 This medication is used to treat symptoms caused by too much stomach acid such as heartburn, upset stomach, or indigestion. It is an antacid that works by lowering the amount of acid in the stomach. It can also be used in renal osteodystrophy with hyperphosphatemia, hypocalcemia and osteoporosis like conditions. It can cause metabolic alkalosis Milk-alkali syndrome 