Lundy is the trade name and the generic name is Calcium Carbonate D3 Tablet (Ⅱ), which is a calcium supplement for children, pregnant women, lactation, the elderly and other people with the effect of preventing and controlling osteoporosis. The main ingredients of Calcium D3 Carbonate Tablets (Ⅱ) are calcium carbonate and vitamin D3. Calcium is an essential element for human body to maintain normal physiological activities of human body such as nerves, muscles, bones, etc. Vitamin D is mainly involved in the metabolism of calcium and phosphorus elements. The drug is mainly used as calcium supplements for children, pregnant women, lactating women, menopausal women, the elderly and so on, with the effect of preventing and controlling osteoporosis. It should be noted that Calcium Carbonate D3 Tablet (II) is contraindicated for those with hypercalcemia, hyperuricemia, calcium-containing kidney stones or a history of kidney stones, and should be used with caution for those who are allergic to the product, and those with cardiac and renal insufficiency. Taking the drug may cause adverse reactions such as belching (burping), constipation, bloating, abdominal pain, diarrhea, and flatulence. Calcium carbonate D3 tablets (II) need to be used in strict accordance with the instructions or follow the doctor’s advice, to avoid adverse reactions to private medication.