1.Do patients with thyroid adenoma need to take medication before surgery? If so, which medications should be taken? What is the purpose? The purpose is to control the symptoms of hyperthyroidism, create conditions for surgery, and prevent the occurrence of postoperative hyperthyroid crisis. 2.If Iodine is taken before surgery, how is the dosage calculated? What are the precautions? Most of them start from 3 drops and increase one drop each time, 3 times a day to 14 drops for maintenance, and some of them start from 10 drops and maintain 10 drops 3 times a day for about 2 weeks, usually not more than 3 weeks. If the symptoms of hyperthyroidism are not well controlled, heart rate control can be added with insulin. 3.What medications do I need to take after surgery? How to determine the medication plan? Generally, you need to continue to take iodine for about 3 days after surgery. If the thyroid function is reviewed one month after surgery and hypothyroidism is found, you can take levothyroxine preparation (Euthyroxine) to control the TSH within the normal range. If combined with convex eyes, eugenol also has a therapeutic effect. 4.What are the side effects of taking thyroxine preparations? Does long-term use have any effect on the body? Thyroid function should be rechecked regularly after taking thyroid preparations. If it is within the normal range, there are generally no side effects for alternative treatment. If overdose is taken, long-term suppression of TSH may lead to subclinical hyperthyroidism (lower TSH, normal FT3 and FT4), which may cause uncomfortable symptoms and some adverse effects (such as increased heart rate, atrial fibrillation, enlarged left ventricle, increased myocardial contractility, impaired diastolic function, etc.), and reduced bone mineral density (BMD) in postmenopausal women.