The generic name of Eugenol is Levothyroxine Sodium Tablets, and the precautions for oral administration of Levothyroxine Sodium Tablets after thyroid cancer surgery are usage, dosage and adverse reactions. 1. The usage of Levothyroxine Sodium Tablet: It is best to take it one hour before meal, and cannot be served with drink, tea, etc. The purpose is to avoid affecting the absorption of the drug when it is taken with food. 2. The dosage of levothyroxine sodium tablets: for low-risk thyroid cancer patients, the dosage of levothyroxine sodium tablets is needed to make the target value of thyrotropin hormone control at 0.1-0.5mU/L; for the middle and high-risk patients, the dosage of levothyroxine sodium tablets is needed to make the target value of thyrotropin hormone control at 0.1mU/L or below. 3. Adverse effects of levothyroxine sodium tablets: thyroid cancer requires oral thyroid hormone replacement therapy after surgery, in the process of treatment will be due to the high or low dose of drugs caused by the body’s adverse reactions, at this time you need to adjust the dose of the drug according to the examination of the thyroid function. If you need to use drugs, you need to use under the guidance of a doctor, do not self-medication to avoid adverse effects on the body.