Three months baby if clearly need to apply drugs to supplement calcium can take calcium supplements are calcium gluconate oral solution, pediatric calcium carbonate D3 granules, etc., need to follow the doctor’s instructions for medication. Three-month-old babies generally do not need additional calcium supplements, but pay attention to the appropriate sunshine, while the baby should be supplemented with vitamin D drops every day, which is conducive to the absorption of calcium. If it is clear that the need for calcium supplements should be used reasonably under the guidance of a doctor, commonly used calcium supplements are as follows. 1. Calcium gluconate oral solution: used for the prevention or treatment of calcium deficiency, such as osteogenesis imperfecta, tetany, children’s calcium supplementation, rickets and so on. Adverse reactions to this product are occasionally constipation. This product is contraindicated in hypercalciuria, hypercalcemia, calcium-containing kidney stones, and those with a history of kidney stones. 2.Pediatric Calcium Carbonate D3 Granules: used for calcium supplementation in children . Adverse reactions can be seen as warmth, constipation, hypercalcemia, abnormal bowel sounds, diarrhea. This product is contraindicated in those with hypercalcemia, calcium-containing kidney stones, hyperuricemia, and history of kidney stones.