Calcium Carbonate / Magnesium Carbonate / Magnesium Oxide
This combination antacid medication is used to relieve symptoms of acid indigestion, heartburn, and upset stomach. It contains multiple magnesium and calcium compounds that work together to neutralize excess stomach acid. This medication is typically used by adults and children experiencing occasional digestive discomfort.
A multi-ingredient antacid combining calcium and magnesium compounds to neutralize stomach acid and relieve heartburn and indigestion.
Key facts at a glance
- RxNorm
- 691010
- Generic
- Calcium Carbonate / Magnesium Carbonate / Magnesium Oxide
- Class
- multi-ingredient
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Treats occasional heartburn, acid indigestion, sour stomach, and general stomach discomfort caused by excess stomach acid. May also be used as a calcium supplement in some formulations.
The calcium carbonate, magnesium carbonate, and magnesium oxide act as antacids by neutralizing hydrochloric acid in the stomach, raising pH to reduce acidity and relieve irritation of the esophagus and stomach lining.
Should not be used by individuals with kidney disease, hypercalcemia, or those on restricted sodium diets without medical supervision. May interact with other medications including antibiotics and iron supplements—take doses at least 2 hours apart. Avoid prolonged daily use beyond 2 weeks without consulting a healthcare provider.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 28, 2026. · Read our editorial policy