Eugenol, known generically as levothyroxine sodium tablets, has been associated with abnormal blood pressure when taken. Clinically, levothyroxine sodium tablets, after taking the hormone secreted by the human thyroid gland, part of it will be transformed into triiodothyronine in the liver and kidney, and enter into the cells to participate in the growth, development and metabolism of the body; it is mainly used for the replacement therapy of hypothyroidism. Usually the drug may cause weight loss, headache, fever, arrhythmia, tachycardia, increased pulse and blood pressure, angina, and other discomforts after taking the drug; therefore, it may have an effect on the fluctuation of blood pressure, which can lead to blood pressure abnormalities, and it is recommended to stop the drug immediately and consult a doctor in time. Secondly, it is prohibited for those who are allergic to the ingredients of the drug; it may cause bone density decrease during the process of taking the drug, and the relevant indicators need to be monitored; at the same time, the thyroid function should be rechecked regularly to assess the treatment effect and adjust the medication in a timely manner; and pregnant women and lactating women need to be guided by a doctor to use the drug. If abnormal blood pressure occurs after taking levothyroxine sodium tablets, it is recommended to stop taking the medicine immediately and consult a doctor for a comprehensive assessment of the condition and adjustment of medication under the guidance of a doctor.