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An antacid you'd take for indigestion contains one or more weakly alkaline chemicals, such as aluminum hydroxide, magnesium hydroxide, calcium carbonate (chalk) or sodium bicarbonate (baking soda). They react with excess hydrochloric acid in the stomach to increase the pH -- making the stomach contents less acidic. Alkalis like sodium or potassium hydroxide -- lye -- are far too strong and would cause serious or fatal injury.

Overuse of antacids can cause serious electrolyte imbalances and other problems. Consult your doctor.

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11y ago

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