Indications of calcium carbonate D3 tablets: 1. Hypocalcemia, osteomalacia, rickets, osteoporosis and renal osteopathy. 2. As a calcium supplement, especially in childhood, adolescence, pregnancy and menopause, pregnant women should supplement calcium regularly. Vitamin C effervescent tablets are vitamin drugs, which can enhance the body's resistance and can be used to prevent and treat various acute and chronic infectious diseases or other diseases. Vitamin C effervescent tablets and calcium carbonate D3 tablets can enhance the absorption of calcium.