Vitamin D3 tablets help support bone healing and strength after fractures and surgery, but the duration of use depends on your blood vitamin D levels, bone health, and your doctor’s advice, and they should not be taken indefinitely without monitoring. In many cases they are prescribed for a few months to a year, and sometimes longer if deficiency persists, especially in people with a history of multiple fractures or ongoing bone health concerns. Regular blood tests are important to guide whether you should continue, stop, or adjust the dose, so you should consult your orthopaedic or general physician to decide the right duration and dosage based on your reports.