Lysine acid calcium hydrogen phosphate granules are used to promote normal growth and development of young children as well as calcium supplementation for children and pregnant women. Its main ingredients are lysine hydrochloride and calcium hydrogen phosphate. Lysine is one of the 8 essential amino acids to maintain the nitrogen balance of the body, which can promote the synthesis and metabolism of proteins and may have an auxiliary effect on the growth and intellectual development of human body. Calcium ion is necessary to maintain the normal function of nerves, muscles and bones; it can promote the formation of calcification of bones and teeth. It also plays an important role in maintaining normal heart, kidney, lung and coagulation functions, as well as cellular and capillary permeability. In addition, calcium is also involved in regulating the secretion and storage of neurotransmitters and hormones, maintaining normal neuromuscular excitability, as well as the uptake and binding of amino acids and the absorption of vitamin B12. The daily requirement of calcium is 400-800mg for newborn to 3 years old, 800mg for 4-6 years old, 800mg for 7-10 years old and 800-1200mg for adults. It should be noted that it should be used with caution in patients with chronic diarrhea or gastrointestinal absorption dysfunction. Use with caution in patients with hyperchloremia, acidosis and renal insufficiency. Use with caution in patients with acute ischemic cerebrovascular disease. Use with caution in patients with ventricular fibrillation. Use with caution during administration of digitalis drugs. Long-term or high doses of calcium may cause a decrease in serum phosphorus concentration. Serum calcium concentration and urinary calcium excretion should be measured regularly for long-term heavy use. Always use under professional medical supervision.