The length of time that middle-aged and elderly people take calcium tablets depends largely on the severity of the calcium deficiency. It can usually last from one to three months, and patients with more serious conditions may need six months to a year. If it is a mild calcium deficiency of the elderly, generally can be appropriate supplementation of calcium tablets can be stopped once a month to three months, if the lack of calcium is relieved, then you can not take for the time being. If the calcium deficiency is more serious, or even suffers from osteoporosis, it may take half a year or even more than a year to take calcium tablets, and the dosage can be gradually reduced after the situation has improved. If patients with chronic diseases need to take some antibiotics and hormones, usually these drugs will aggravate the symptoms of osteoporosis in elderly patients, these patients may need to take calcium tablets for life. For those who take calcium supplements daily, it is recommended to take the supplements for one to three months and then have a checkup, if the body is not deficient in calcium, then it can be temporarily discontinued. For patients with diseases that require calcium tablets, it is recommended that patients follow the advice of their primary care physician to take them for as long as the doctor tells them to.