Alfacalcidol drops are mainly used for the treatment of osteoporosis, nephrotic bone disease, parathyroid disorders, etc. They help to promote the absorption of calcium in the body. Patients should pay attention to the usage and dosage when using alfacalcidol drops, not to use too much of this drug, and not to increase the dosage or stop and reduce the dosage without authorization, which can have adverse effects on the condition. For certain indications and contraindications patients should be clearly not to use indiscriminately, especially adolescent patients, limited to adolescent idiopathic osteoporosis and osteoporosis caused by excessive glucocorticoids. If the drug dose of alfacalcidol drops is relatively high, gastrointestinal dysfunction and even other systemic disorders, such as circulatory system, may occur, so patients should not stop, increase or decrease the dose without authorization.