Check the Nutrition Facts label on the antacid. You will need at least seven antacid tablets per day to fulfill your calcium requirement. According to my pharmacist, one brand of antacid contains 160 milligrams of calcium. Calcium supplementation currently recommended is 1,500 milligrams per day for women not taking estrogen and 800 milligrams per day for women on estrogen. No matter what the fat content of milk is, there is close to 300 milligrams of calcium in one cup of fluid milk.
Calcium carbonate is currently the best and least expensive form of calcium supplement available.
A roll of antacids is slightly more expensive per day than the same amount of calcium carbonate supplements. I have some concerns about using antacids as calcium supplements. The absorption of some other vitamins and minerals is decreased in the presence of antacids. The absorption of riboflavin , vitamin C and iron is decreased by antacids. According to the same pharmacist, antacids used as a calcium supplement does not seen to negatively effect absorption of other vitamins as much as liquid antacids.