Eugenol is the trade name of Levothyroxine Sodium Tablets, the main ingredient is Levothyroxine Sodium. Levothyroxine Sodium Tablet has the function of replacing thyroid hormone, mainly for the treatment of hypothyroidism and other diseases, and needs to be applied under the guidance of professional physicians. Levothyroxine sodium tablets can also be used for postoperative suppression therapy of thyroid cancer, thyroid suppression test, and adjuvant therapy for hyperthyroidism treated with antithyroid drugs. It should be noted that tachyarrhythmia, recent myocardial infarction patients, the use of the drug may lead to sudden death, such patients are prohibited from using the drug treatment; the use of the drug treatment needs to start from a small dose, gradually adjusted to the therapeutic dosage, shall not be unauthorized to increase or decrease the dosage; the drug is not suitable for use with aspirin, bicoumarins, so as not to aggravate the adverse reactions. The use of the drug needs to be carried out under the guidance of a professional physician, the use of drugs need to regularly monitor the thyroid function, in order to avoid adverse consequences.