Lysine Calcium Hydrogen Phosphate Granules is a common pediatric drug, which is a compound preparation containing two active ingredients, lysine hydrochloride and calcium hydrogen phosphate, and its main pharmacological effect is to promote the normal growth and development of young children, and is a calcium supplement for children and pregnant women. Because it is a compound preparation, it contains lysine, which is one of the essential amino acids and has the function of regulating growth and development and promoting intellectual development, so it can promote the normal height and brain development of infants and children. It also contains calcium hydrogen phosphate, which can also provide children with effective calcium supplementation. However, a few children may experience constipation and abdominal discomfort during calcium administration. It is important to note that pediatric blood calcium and biochemical levels should be monitored during the application of these medications to prevent adverse side effects such as stones and related adverse effects due to hypercalcemia. The use of these drugs is strictly prohibited in children with hypercalcemia, previous kidney stones, or tumor-like diseases.