Sage’s generic name is methimazole, after using the drug to eat into hypothyroidism may be because of taking too large a dose, you should gradually reduce the dosage of methimazole, and regularly monitor the thyroid function. Methimazole belongs to the imidazole class of drugs, is a commonly used antithyroid drugs, mainly through the reduction of thyroid hormone synthesis, in order to achieve the purpose of the treatment of hyperthyroidism. If hyperthyroid patients take too much methimazole dose, the symptoms of hypothyroidism will appear, which is generally called drug hypothyroidism. Patients should go to the hospital in time, under the guidance of the doctor to gradually reduce the dose of methimazole, and appropriate use of levothyroxine. It is also necessary to check the thyroid function regularly, so as to avoid the recurrence of hyperthyroidism caused by too large a reduction in the dose of the drug. Common adverse reactions to this drug include rash, itching of the skin and leukopenia. It is contraindicated in lactating women. It is recommended that patients with hyperthyroidism experience symptoms of hypothyroidism, go to the hospital in time, and not blindly stop or reduce the drug.