Methimazole tablets are prescription drugs and need to be purchased over the counter with a doctor’s prescription. Methimazole tablets are antithyroid drugs, used for goiter, hyperthyroidism, hyperthyroidism preoperative preparation, radioactive iodine treatment prophylaxis, thyrotoxic crisis, radioactive iodine treatment after auxiliary treatment, is a commonly used clinical drugs. However, methimazole tablets belong to the prescription drugs, can not be purchased on their own, you need to buy with a doctor’s prescription in the pharmacy. Methimazole tablets can cause adverse reactions in the blood system, nervous system, gastrointestinal system, skin abnormalities. It is contraindicated for pregnant and lactating women, and for those who are allergic to methimazole, other thioamide derivatives, thioamide derivatives, or the distribution of any excipients. It is recommended to use the drug under the guidance of a doctor, not blindly self-medication.