Generally, pregnant women don’t need to take vitamin D when taking Calcium D3 Carbonate Tablets, and they should follow the doctor’s instructions for medication. Calcium D3 Carbonate Tablets is a kind of compound preparation, which is suitable for calcium supplementation for people in pregnancy, lactation, menopause and old age, and also can prevent and control osteoporosis. Since Calcium D3 Carbonate Tablet contains calcium carbonate and vitamin D3, pregnant women do not need to take vitamin D after taking this medicine, so that oversupplementation will cause counteracting effects, which will adversely affect their own health and the development of the fetus. Some people may experience adverse reactions such as belching and constipation after taking Calcium Carbonate D3 Tablet, while overdose will cause hypercalcemia and alkalosis, which should be taken seriously. For people with hypercalcemia, hyperuricemia, calcium-containing kidney stones or history of kidney stones, it is contraindicated to take Calcium Carbonate D3 Tablet; while cardiac and renal insufficiency and allergic individuals should be cautious. Pregnant women are advised to take Calcium D3 Carbonate Tablets under the guidance of a physician, and not to use the medication on their own. During pregnancy, it is recommended that pregnant women take Calcium Carbonate D3 Tablets under the guidance of a physician.