Euthyrox refers to Levothyroxine Sodium Tablets. The dosage of Levothyroxine Sodium Tablet required for patients after thyroid nodule surgery is different and needs to be combined with the patient’s thyroid function, not generalized, it is recommended to consult a doctor. Levothyroxine sodium tablets are mainly used to exogenously supplement the body’s thyroid hormones. Whether a patient needs levothyroxine sodium tablets after surgery for thyroid nodules and the dosage needed to be taken is related to the functional size of the thyroid tissue that survives in the patient after surgery. Some patients may need to have their thyroid tissue removed during surgery, or may be deficient in the amount of thyroid hormone synthesized by the patient due to the destruction of thyroid tissue caused by the surgery, thus requiring oral administration of levothyroxine sodium tablets to replace the deficient thyroid hormone after surgery. The starting dose and the time required to achieve full replacement are determined by age, body weight, and cardiac function. In actual clinical practice, Levothyroxine Sodium Tablets should be taken as prescribed by the physician, with regular reviews, and without increasing or decreasing the dosage.