Calcium Carbonate
Tums is an over-the-counter antacid containing calcium carbonate, used to relieve symptoms of acid indigestion, heartburn, and upset stomach. It works by neutralizing excess stomach acid to provide quick relief from digestive discomfort. Tums is commonly used by adults and children over 12 years old for occasional symptoms.
Tums is a calcium-based antacid that neutralizes stomach acid to relieve heartburn, indigestion, and sour stomach.
Key facts at a glance
- RxNorm
- 220508
- Generic
- Tums
- Class
- brand-name
- 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.
Tums is used to treat occasional heartburn, acid indigestion, sour stomach, and symptoms of overeating or consuming acidic foods and beverages.
Tums contains calcium carbonate, which works as a buffer to neutralize hydrochloric acid in the stomach, raising pH levels and reducing the acidity that causes heartburn and indigestion.
Do not exceed the recommended dose; excessive use may cause constipation, gas, or nausea. Those with kidney disease, hypercalcemia, or taking prescription medications should consult a doctor before use. Tums may interfere with absorption of certain antibiotics and iron supplements if taken simultaneously.
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 25, 2026. · Read our editorial policy