Yes, Calcium Carbonate Treats Indigestion
Calcium carbonate is an antacid that neutralizes stomach acid to relieve indigestion symptoms like heartburn, acid reflux, and upset stomach. It reacts with hydrochloric acid in the stomach to form calcium chloride, water, and carbon dioxide, raising the stomach's pH.[1]
How Calcium Carbonate Works for Indigestion
It provides fast relief, often within minutes, by directly countering excess acid. Common brands include Tums and Rolaids. Doses are typically 500-1,000 mg per tablet, taken as needed up to 7 times daily for adults, but follow label instructions.[2]
Common Uses Beyond Basic Indigestion
Doctors also recommend it for gastroesophageal reflux disease (GERD), sour stomach, and as a calcium supplement. It's available over-the-counter in chewable tablets, liquids, or lozenges.[1][2]
How Long Relief Lasts and When to Take It
Effects last 1-2 hours. Take it after meals or at indigestion onset, but avoid with milk or antacids containing aluminum/magnesium for best absorption.[2]
Side Effects Patients Report
Most people tolerate it well, but high doses can cause constipation, gas, or bloating. Rare risks include kidney stones in those with kidney issues or high-calcium diets. Don't use long-term without doctor advice, as it may mask serious conditions like ulcers.[1][2]
Who Should Avoid It
Pregnant or breastfeeding individuals, kids under 12, or those with kidney disease should consult a doctor first. It interacts with antibiotics, iron supplements, and thyroid drugs—space doses by 2 hours.[2]
Alternatives if Calcium Carbonate Isn't Right