Children 14 years of age can take Lysine Calcium Hydrogen Phosphate Granules as directed by their doctor if they meet the indications such as calcium deficiency. Lysine Calcium Hydrogen Phosphate Granules is a compound preparation made of lysine hydrochloride, phosphoric acid and calcium hydroxide, which is suitable for the promotion of normal growth and development of young children, as well as calcium supplementation for children and pregnant women. The drug should be contraindicated in patients with sarcoidosis (which can exacerbate hypercalcemia), patients with concomitant hypercalcemia, hypercalciuria, and calcium-containing renal stones or a history of renal stones. Children 14 years of age may take Lysine Calcium Hydrogen Phosphate Granules as prescribed by the physician, provided that indications such as calcium deficiency are met. Adverse effects are generally rare when taken in the recommended dosage, but adverse effects such as belching, constipation, abdominal discomfort, hypercalcemia, and kidney stones may occur. Specific medication should be under the guidance of a specialist, not unauthorized use of medication.