U.P.Cal, which contains calcium carbonate, is used as an antacid to relieve symptoms of digestive problems, such as indigestion, stomach ulcers, and gastroesophageal reflux disease. It can also be used to treat or prevent calcium deficiency, such as osteoporosis, kidney failure, and hypothyroidism. In addition,
U.P.Cal is used to treat high levels of phosphate in the blood, as it binds to phosphate and reduces its absorption.