Most people tolerate Tums well, with no side effects, according to Drugs.com; however, some patients experience a rebound increase in stomach acidity, constipation or calcium gallstones. Gallstones are a rare side effect and most commonly occur in patients with a prolonged use of the antacid.
Tums affect the absorption of other medication, explains MedlinePlus. To prevent the interaction, patients should wait at least one hour after taking the other medication before taking Tums. After use of the antacid, the patient should wait at least four hours before taking another medication.
Patients with kidney stones, who are on a sodium-restricted diet or those with sodium restrictions, should speak with their doctor before using Tums, according to MedlinePlus. Antacids do not provide effective treatment for more serious conditions, such as ulcers, appendicitis or bowel problems. They are most effective for heartburn that occurs occasionally and not every day.
Patients also use Tums as a calcium supplement, notes WebMD. The supplement helps to prevent low blood calcium when an individual does not get enough of this mineral through the normal diet. Increasing blood calcium levels helps to treat parathyroidism, prevent bone loss due to osteoporosis and ensure nursing and pregnant women have enough calcium for their bodies and their babies.