Treating or preventing calcium deficiency. It may also be used for other conditions as determined by your doctor.
Calcium carbonate is a dietary supplement. It works by providing extra calcium to the body.
Do NOT use calcium carbonate if:
- you are allergic to any ingredient in calcium carbonate
- you have high blood calcium levels
Contact your doctor or health care provider right away if any of these apply to you.
Before using calcium carbonate:
Some medical conditions may interact with calcium carbonate. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:
- if you are pregnant, planning to become pregnant, or are breast-feeding
- if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
- if you have allergies to medicines, foods, or other substances
- if you have high blood phosphate levels or high levels of calcium in the urine
- if you have dehydration, heart problems, hardening of the arteries, kidney problems, kidney stones, or sarcoidosis
- if you take digoxin
- if you have taken a direct thrombin inhibitor (eg, dabigatran) within the past 24 hours
Some MEDICINES MAY INTERACT with calcium carbonate. Tell your health care provider if you are taking any other medicines.
Ask your health care provider if calcium carbonate may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.
For Healthcare Professionals
Applies to calcium carbonate: compounding powder, oral capsule, oral gum, oral powder, oral suspension, oral tablet, oral tablet chewable
Rebound hyperacidity has been associated with calcium salt antacids. This side effect does not appear to be due to the acid buffering capacity of calcium carbonate, but is a consequence of a specific action of calcium on the parietal cell.
Prolonged ingestion of large amounts of calcium carbonate and other sources of exogenous calcium can rarely result in the "milk alkali syndrome" and calcinosis. The milk alkali syndrome is characterized by the triad of hypercalcemia, metabolic alkalosis, and renal insufficiency.
Metabolic side effects have rarely included hypercalcemia and hypophosphatemia. Hypercalcemia may be more likely and more severe in patients with renal dysfunction. In patients on chronic dialysis, hypercalcemia may also result from excessive calcium in the dialysate, vitamin D intoxication, or severe secondary hyperparathyroidism. Other metabolic side effects have rarely included "mild alkali syndrome", calcinosis, and irreversible renal damage.
Renal side effects have included renal failure, formation of renal calcium and a single case report of a calcium carbonate and calcium phosphate-filled renal cyst.
The renal failure that accompanies hypercalcemia and alkalosis in the milk alkali syndrome is usually transient.