It is generally considered safe to take Tums during pregnancy for occasional relief of heartburn and indigestion. Tums, which contain calcium carbonate, can help neutralize stomach acid and also provide supplemental calcium for both mother and baby. However, it is important to follow the recommended dosage and not exceed the limit (usually no more than 10-15 tablets per 24 hours depending on the strength). Chronic or excessive use should be avoided as it may lead to side effects such as kidney stones, constipation, and interference with iron absorption. It’s also recommended to space Tums apart from iron supplements by at least 1-2 hours to avoid absorption issues. Consulting a healthcare provider before starting any medication during pregnancy is always advisable.