Hyperthyroidism taking medication and still keep losing weight may be the thyroid hormone level is not controlled and stabilized, may also be physiological factors, other disease factors caused by, it is recommended to consult a doctor. Hyperthyroidism patients need to take methimazole, propylthiouracil and other antithyroid drugs, after taking the drugs need to wait for the thyroid gland to store the thyroid hormone consumption, generally in the medication 2 to 3 weeks after the reduction of clinical symptoms, 4 to 6 weeks after the metabolic state can be returned to normal. So after taking the drug if the thyroid hormone level has not been controlled and stabilized hyperthyroidism symptoms will still exist, there may be weight loss. In addition, if the intake is reduced but the consumption is increased, it may also cause weight loss, and other diseases such as diabetes may also cause weight loss. Patients with hyperthyroidism who continue to lose weight despite taking medication are advised to seek medical attention if their symptoms persist or are not relieved by dietary modifications.