Active Ingredient

Calcium Carbonate

Calcium Carbonate is a widely used mineral supplement and antacid. It is commonly utilized to treat conditions related to low calcium levels in the body and to relieve heartburn or indigestion.

This ingredient is often recommended for individuals who need to increase their calcium intake or manage acidity in the stomach.

Written By Douglas C. Goldberg, MD

Reviewed By Philip Schein, MD

Last Updated 28 Nov 2025

Available Calcium Carbonate Brands

Calcium Carbonate

Strengths 250 mg, 500 mg

Calcium Carbonate Uses

Calcium Carbonate is used for a variety of health conditions related to calcium deficiency and digestive issues.

Treating and preventing calcium deficiency.
Relieving symptoms of heartburn, acid indigestion, and upset stomach.
Supporting bone health in conditions like osteoporosis.
Maintaining proper function of nerves, muscles, and heart.
Used as a phosphate binder in patients with kidney disease.

How Calcium Carbonate Works

Calcium Carbonate works by neutralizing stomach acid, which helps relieve symptoms of indigestion and heartburn. It acts as a buffer against acidity, providing quick relief from discomfort.

As a calcium supplement, it supplies the body with calcium, an essential mineral for maintaining strong bones and teeth, and supporting muscle and nerve function.

Common side effects of Calcium Carbonate

While not everyone experiences side effects, some individuals may encounter mild and temporary symptoms when using Calcium Carbonate.

Constipation
Gas or bloating
Nausea
Stomach discomfort
Dry mouth
Increased thirst

If you experience serious or persistent side effects, it is important to contact your doctor.

Take Calcium Carbonate with food to improve absorption and reduce stomach upset.
Avoid consuming large amounts of alcohol, which can interfere with calcium absorption.
Inform your doctor about any other medications you are taking to prevent potential interactions.
Do not use if you have a history of kidney stones without consulting a healthcare professional.
Monitor for symptoms of high calcium levels, like nausea or weakness, and report them to your doctor.

Always consult your doctor or healthcare provider for personalized advice.

Frequently Asked Questions

What is Calcium Carbonate used for?

Calcium Carbonate is used to treat and prevent calcium deficiencies and to relieve heartburn and indigestion.

How does Calcium Carbonate work as an antacid?

It works by neutralizing stomach acid, providing relief from heartburn and indigestion symptoms.

Can Calcium Carbonate interact with other medications?

Yes, it can interact with certain medications. It’s important to discuss all your current medications with your doctor.

Are there any dietary restrictions while taking Calcium Carbonate?

It’s advisable to avoid excessive alcohol and caffeine, as they may affect calcium absorption.

Is Calcium Carbonate safe for long-term use?

Long-term use should be monitored by a healthcare professional to avoid potential complications like kidney stones.