Calcium Carbonate / Magnesium Chloride
This combination antacid contains calcium carbonate and magnesium chloride, which work together to neutralize excess stomach acid. It is commonly used to provide relief from heartburn, acid indigestion, and upset stomach caused by acid reflux or dietary triggers. The calcium component also offers supplemental calcium for bone health in some formulations.
A dual-action antacid that neutralizes stomach acid while providing supplemental minerals for digestive relief and bone support.
Key facts at a glance
- RxNorm
- 729490
- Generic
- Calcium Carbonate / Magnesium Chloride
- Class
- multi-ingredient
- Brands
- Slow-Mag Reformulated Feb 2012
- 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 symptoms of excess stomach acid including heartburn, acid indigestion, sour stomach, and general digestive discomfort. Some formulations also serve as calcium supplements for bone health.
Calcium carbonate acts as a fast-acting acid neutralizer, while magnesium chloride helps balance the formula and may provide mild laxative effects. Together they raise gastric pH to relieve acid-related symptoms.
Take as directed, typically after meals or at onset of symptoms. May interact with certain medications including antibiotics and iron supplements—separate doses by 2 hours. Avoid prolonged high-dose use without medical supervision. Not recommended for patients with severe kidney disease or hypercalcemia. Drink adequate fluids when taking.
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