The generic name of Eugenol is Levothyroxine Sodium Tablet. If severe insomnia is considered as a possible adverse reaction of Levothyroxine Sodium Tablet after use of the drug, it is necessary to reduce the daily dosage or discontinue the drug under the supervision of a doctor. Levothyroxine Sodium Tablet is mainly used for the replacement therapy of hypothyroidism, non-toxic goiter, and postoperative suppressive therapy of thyroid cancer. Manifestations of hyperthyroidism, such as insomnia and palpitations, may occur if the dosage exceeds the individual tolerance or is excessive. Adverse reactions of this product include arrhythmia, angina pectoris, tachycardia, flushing, headache, fever, vomiting, insomnia, tremor, diarrhea, etc. It is contraindicated for those who are allergic to this product, those with acute myocardial infarction, those with untreated hypoadrenalism, and those with thyrotoxicosis. It is recommended to use the medication under the guidance of a physician and to check the level of thyroxine in the body at regular intervals in the hospital, so as to determine the optimal dosage of levothyroxine sodium tablets.