Patients with vitamin D deficiency, or patients with osteoporosis, it is recommended to take vitamin D for a long period of time. when can you stop, first of all, after a period of time of regular use of the drug, review the level of 25-hydroxyvitamin D3 in the body, if the level of 25-hydroxyvitamin D3 reaches the normal range, you can suspend the use of vitamin D3. But for osteoporosis patients, vitamin D taking belongs to the most basic drug treatment, so it is recommended that osteoporosis patients long-term persistence in taking vitamin D, but also need to regularly monitor, 25-hydroxyvitamin D levels, as well as blood calcium, urinary calcium levels, to avoid the occurrence of hypercalcemia or hyperuricemia, so as not to cause the incidence of urinary tract stones increased.