Methimazole tablets are used for the treatment of hyperthyroidism and are indicated for patients with mild hyperthyroidism with goiter, patients who are not suitable for surgery, preoperative preparation for hyperthyroidism, and patients treated with radioactive iodine. There is no fixed time to take this drug, and it can be taken at any point in time. Methimazole tablets are used to treat hyperthyroidism by inhibiting the action of thyroid peroxidase, preventing the thyroid gland from synthesizing T3 and T4, and reducing the level of thyroxine in the body. The mechanism of action of methimazole tablets can be understood that they do not stimulate the gastrointestinal tract and can be taken at any point in time. However, methimazole tablets can affect liver function, such as causing a decrease in white blood cells and a lack of granulocytes in the body. Therefore, liver function should be monitored regularly while taking the medication, and liver-protective medication should be administered under the guidance of a thyroid surgeon if necessary.