Calcium Carbonate D3 Granules can be taken with warm water or boiled water, as directed by your doctor. The main ingredients of Calcium Carbonate D3 Granules include Calcium Carbonate and Vitamin D3, which is a calcium supplement for pregnant and lactating women, menopausal women, and the elderly who are susceptible to calcium deficiency, as well as for the prevention and treatment of osteoporosis. The drug is generally recommended to be taken with a moderate amount of water, not explicitly indicated to be taken with warm or boiled water, then both brewing methods are fine. Calcium Carbonate D3 Granules are contraindicated in people who are allergic to the product, those with hypercalcemia, and those with hyperuricemia. Belching (hiccups), constipation, hypercalcemia, milk-alkali syndrome (i.e., alkalosis, hypercalcemia and renal insufficiency) may occur after use. The use of the drug must follow the doctor’s instructions, do not blindly use the drug, in order to avoid adverse consequences.