Do not take calcium carbonate or antacids containing calcium without first talking to your doctor if you take other medications. Calcium can decrease the effects of many other medicines by binding to them or by changing the acidity of the stomach or the urine. Take calcium with meals to increase its absorption into your body. Calcium is a mineral that is found naturally in foods. Calcium is necessary for many normal functions of your body, especially bone formation and maintenance.
Calcium carbonate is used to prevent and to treat calcium deficiencies.
Calcium carbonate may also be used for purposes other than those listed in this medication guide. You may not be able to take calcium carbonate, or you may require a lower dose or special monitoring during treatment if you have any of the conditions, or take any of the medications, listed above. Talk to your doctor before taking calcium carbonate if you are pregnant. In general, calcium is important for the development of an unborn baby. Talk to your doctor before taking calcium carbonate if you are breast-feeding.