The commonly used calcium supplement injection is calcium gluconate injection, which is an electrolyte balance regulator. It is mainly used to treat diseases caused by calcium deficiency, when the body calcium ion is very low, it can be injected to carry out rapid replenishment treatment. The main ingredient is calcium gluconate. It is suitable for acute hypocalcemia, alkalosis and tetany caused by hypoparathyroidism, as well as allergic disorders, magnesium poisoning relief, fluoride poisoning relief, and can also be applied in cardiac resuscitation (such as hyperkalemia or hypocalcemia, or calcium channel block caused by cardiac function abnormality of relief). Intravenous injection can have generalized fever, too fast injection can produce arrhythmia or even cardiac arrest, vomiting, nausea and so on. The main adverse reaction of this drug is drug overdose, overdose can cause hypercalcemia, which can be manifested in early stage as constipation, drowsiness, persistent headache, loss of appetite, etc., and in the late stage as confusion, hypertension, and sensitivity of eyes and skin to light. It should be noted that the drug should not be used in patients with renal insufficiency and patients with respiratory acidosis, and it is forbidden to sedate the product during the application of cardiac glycosides. It is forbidden to use with oxidizing agents, citrates, soluble carbonates, phosphates and sulfates. This drug is a prescription drug, must be standardized under the guidance of a doctor, do not blindly use their own medication, so as not to delay the condition.