The main ingredient of Cholestyramine Milk is vitamin D3, one Cholestyramine Milk is 8ml, containing 300,000 units of vitamin D3, the main function is to promote calcium absorption, used in the treatment of vitamin D deficiency. It is mainly used in pediatrics for vitamin D deficiency rickets, and can also be used in adults if they are vitamin D deficient. In general if vitamin D deficiency, patients are recommended to take a small dose of vitamin D every day, but there are some patients who may have a particularly severe vitamin D deficiency, or there is not able to take vitamin D every day, so patients can also be candidates for a one-time large dose of vitamin D, you can choose to choose cholestyramine milk. The exact dosage and duration of use of cholecalciferol will depend on the patient’s vitamin D deficiency.