Calcium Carbonate / Magnesium Oxide
Calcium Carbonate/Magnesium Oxide is a combination supplement that provides essential minerals for bone health while also acting as an antacid to neutralize stomach acid. It's commonly used to treat symptoms of heartburn, indigestion, and acid reflux, as well as to prevent or treat calcium and magnesium deficiencies. The formulation combines two minerals that work together to support musculoskeletal function.
A mineral supplement and antacid combination used for heartburn relief and to support bone and muscle health.
Key facts at a glance
- RxNorm
- 821119
- Generic
- Calcium 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 heartburn, acid indigestion, gastroesophageal reflux disease (GERD), calcium deficiency, magnesium deficiency, and supports osteoporosis prevention. May also help with muscle function and nerve transmission.
Calcium Carbonate neutralizes stomach acid through an acid-base reaction, providing rapid relief from heartburn symptoms. Magnesium Oxide helps supplement magnesium levels in the body, which is essential for bone formation, muscle contraction, and nerve function. The two ingredients work synergistically to support overall mineral balance.
Should be taken with food for optimal absorption. Separate from other medications by at least 2 hours. May interact with certain antibiotics and thyroid medications. Not recommended for individuals with kidney disease without medical supervision. Side effects may include constipation or diarrhea depending on individual sensitivity.
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