Calcium injections are mainly used for hypocalcemia, especially when the calcium ion is low, because if the calcium ion is very low, there is a risk of abnormal heart and lung function, which can have an impact on human life, so in the case of severe hypocalcemia, it is best to be treated by means of calcium injections. Intravenous drip and intravenous push of calcium gluconate injection as well as calcium chloride injection can effectively play a role in calcium supplementation. Calcium injections can also be used for milder forms of hypocalcemia, and can be effective in relieving cramps in the skeletal muscles of the body. It can also be used for the elderly and menopausal women with osteoporosis, because the body will experience calcium loss leading to osteoporosis, after calcium supplementation through calcium injections, can effectively prevent and treat the effect of osteoporosis.