Calcium carbonate is given with meals to a child with chronic renal disease. The purpose of this is to:
a. Prevent vomiting.
b. Bind phosphorus.
c. Stimulate appetite.
d. Increase absorption of fat-soluble vitamins.
ANS: B
Oral calcium carbonate preparations combine with phosphorus to decrease gastrointestinal absorption and the serum levels of phosphate; serum calcium levels are increased by the calcium carbonate, and vitamin D administration is necessary to increase calcium absorption. Calcium carbonate does not prevent vomiting, stimulate appetite, or increase the absorption of fat-soluble vitamins.
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