Thyroxine controls the rate of metabolism of all cells in the body, and if it is lacking, it will not be able to survive in the long run. The function of the thyroid gland, however, is to make thyroxine. If only one side of the thyroid gland is removed and the healthy other side is left intact, the vast majority of patients in this situation will not need to take medication. However, if both sides of the thyroid gland are removed, the patient must take thyroxine supplements for life. However, a very small daily dose of supplements is all that is needed to be able to function as a normal person. In addition to supplements, a few patients need to take calcium tablets and vitamins.