Sage is not a hormonal drug, also known as methimazole tablets, and is an anti-thyroid drug. Its mechanism of action is to inhibit the enzyme peroxidase in the thyroid gland, thus preventing the oxidation of iodide and tyrosine coupling in the thyroid gland, and impeding the synthesis of thyroxine, or T4 and triiodothyronine (T3). In clinical practice, Sage is mainly used for the treatment of hyperthyroidism, especially in young patients without or with mild thyroid enlargement, and for the preparation of various types of hyperthyroidism before surgery, as well as for the preparation of patients with hyperthyroidism after proposed radioactive iodine therapy to prevent the occurrence of post-treatment thyroid toxicity crisis, and for intermittent treatment after radioactive iodine therapy. intermittent treatment after treatment. In individual cases, when conventional therapeutic measures cannot be applied due to the patient’s general condition and personal reasons, or when the patient refuses to accept conventional therapeutic measures, methimazole tablets can be used for long-term treatment of hyperthyroidism because they are well tolerated.