Calcium carbonate D3 tablets (II), especially chewable tablets, must be chewed to take, so that the absorption of calcium will be better, but if the patient does not want to chew, want to swallow can also be, but this may be less effective, this situation must not be stuck to cause obstruction of the esophagus. If you take it before meals, it may affect the absorption of calcium due to the secretion of more gastric acid during fasting, so try to take it half an hour after meals. If you eat vegetables during meals, they contain oxalic acid, which can combine with calcium to form calcium oxalate and cause stones. The reason for taking it before going to bed is that the blood calcium is lower before going to bed and can be easily absorbed. Therefore, try to choose to take it after half an hour after meals or at night when you go to bed. In addition, patients should be careful not to take it at the same time with milk that is high in calcium, which can also affect absorption. Because Calcium Carbonate D3 Tablets (II) is a calcium supplement used as a calcium supplement for menopausal women, women during pregnancy and lactation, and for the prevention of osteoporosis in the elderly.