Calcium carbonate and magnesium hydroxide

Calcium carbonate and magnesium hydroxide is a combination antacid that helps relieve indigestion, upset stomach, and heartburn.

Calcium carbonate and magnesium hydroxide may also be used for other reasons not mentioned in this medication guide.

Follow all instructions on the label and package. Use exactly as directed.

Ask a doctor or pharmacist before using calcium carbonate and magnesium hydroxide if you have health problems or are taking other medications.

Ask a doctor before using this medicine if you are pregnant or breastfeeding.

Do not give this medicine to a child without medical advice.

Get emergency medical help if you have signs of an allergic reaction: hives, difficulty breathing, swelling of your face, lips, tongue, or throat.

Stop using calcium carbonate and magnesium hydroxide and call your doctor right away if you have symptoms of high calcium or magnesium levels in your blood:

• nausea, vomiting, constipation;
• increased thirst or urination;
• muscle weakness, bone pain;
• confusion, weakness, feeling tired;
• trouble breathing; or
• slow heart rate, feeling light-headed.

Common side effects of calcium carbonate and magnesium hydroxide may include:

• diarrhea;
• constipation; or
• upset stomach.

This is not a complete list of side effects and others may happen. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Use exactly as directed on the label, or as prescribed by your doctor.

You must chew the chewable tablet before you swallow it.

Do not use calcium carbonate and magnesium hydroxide for longer than 14 days in a row without medical advice. Do not use more than 7 tablets in a 24-hour period.

Store at room temperature away from moisture and heat.

Calcium carbonate and magnesium hydroxide can be taken as needed and does not have a daily dosing schedule.

Seek emergency medical help or call the Poison Help line at 1-800-222-1222.

Do not take other medications at the same time as an antacid. Some antacids can make it harder for your body to absorb other medicines you take by mouth.

Ask a doctor or pharmacist before using calcium carbonate and magnesium hydroxide with any other medicines, especially:

• an antibiotic;
• heart or blood pressure medication;
• HIV or AIDS medications; or
• medication to treat osteoporosis or Paget's disease of bone.

This list is not complete and many other drugs may affect calcium carbonate and magnesium hydroxide. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.