Pediatric Calcium Carbonate Vitamin D3 Granules, this medication can be dissolved in warm water and fed with a small spoon or empty syringe. Pediatric Calcium Carbonate Vitamin D3 Granules should be taken orally, one sachet once daily, or as directed by your doctor, according to the drug’s instructions. Calcium carbonate granules are relatively high in calcium and are easily absorbed, and its helps with pediatric calcium supplementation. However, one of the adverse effects of Calcium Carbonate is that it causes constipation in children, so it is not recommended for babies with poor gastrointestinal function. Generally speaking, with a normal diet and regular vitamin D supplementation, calcium deficiency is unlikely to occur in children, and calcium supplementation is often needed only when children show symptoms of calcium deficiency. However, it is worth noting that this product should not be consumed with milk to avoid alkalosis.