What does an antacid do in the body?

Question

What does an antacid do in the body?

Answer 1

Antacids neutralize the acid in your stomach. But some commonly used antacids can have other effects as well. Calcium carbonate can cause constipation. If used in very high doses, it can also cause a condition in which the medication no longer reduces acid reflux but instead actually causes it. This is called rebound hyperacidity.

Sodium bicarbonate can cause imbalances in the electrolytes, or salts, in your blood, changing its chemistry.

Magnesium hydroxide and magnesium oxide can affect bowel function, sometimes causing diarrhea. Because it can build up in the kidneys, don't take it if you have kidney problems.

Aluminum hydroxide can cause constipation. Because it can build up in the kidneys, don't take it if you have kidney problems. Also, aluminum hydroxide antacids may reduce substances in your blood required for energy, called phosphates.