Calcium-based antacids are used to neutralize stomach acid by lowering its pH. These antacids contain calcium and alleviate the symptoms of heartburn, acid reflux, and indigestion. They may be available with a prescription or in over-the-counter form. Commonly used calcium-based antacids include Dicarbosil (calcium carbonate), Rolaids (calcium carbonate) and Tums (calcium carbonate).
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