Answer :

Antacids having magnesium hydroxide is most preferable antacid over calcium carbonate because  antacids having calcium carbonate has the risk of kidney failure.

Magnesium hydroxide is used in antacids. It is in the form of magnesium citrate and magnesium sulphate.in the case of diarrheas' antacid of magnesium is added in the antacid that cure diarrheas' and other diseases. magnesium is not absorbs by the body but the acids present in the stomach forms magnesium chloride which easily absorbs by the body. most antacids contain magnesium hydroxide is most preferable antacid. Caco3 is the most suitable antacid. it can completely absorbs in human body. but there is  a high risk of kidney stones and kidney failures. calcium carbonate have the tendency of rebound the gastric acid secretion.

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