Levothyroxine Sodium Tablets are used for the treatment of congenital hypothyroidism, for the treatment of simple goiter, for the treatment of chronic lymphoid thyroiditis, and for suppression or replacement therapy after surgery for thyroid cancer, as well as in suppression tests for the diagnosis of hyperthyroidism. Levothyroxine Sodium Tablet may cause angina pectoris, cardiac arrhythmia, diarrhea and vomiting, tremor, excitation headache, restlessness and insomnia, excessive sweating and flushing, weight loss, and spasm of skeletal muscles after overdose, and the above manifestations will disappear naturally after the patient reduces the dosage or stops taking the medicine for a few days. The use of levothyroxine sodium tablets should pay attention to, for patients suffering from coronary heart disease and elderly patients should be under the guidance of a doctor to use the drug, do not take the drug privately. Meanwhile, people with hypopituitarism or hypoadrenocorticism should use adrenocorticotropic hormone a few days before taking levothyroxine sodium tablets. For pregnant women and lactating women, it is recommended that close monitoring should be done when taking this product and immediate medical attention should be sought in the event of an adverse reaction. When taking such drugs, patients need to be diagnosed by a specialized doctor, and after diagnosis, the drug should be taken under the guidance of the doctor.