The generic name of Eugenol is Levothyroxine Sodium Tablet, which is used reasonably under the guidance of a doctor and generally seldom injures the stomach, liver or kidneys. Levothyroxine Sodium Tablet is mainly used for the replacement therapy of non-toxic goiter and hypothyroidism, and its main adverse reactions are the manifestations of hyperthyroidism, such as palpitation, hand tremor, excessive sweating, insomnia, weight loss, increased appetite, etc., which may induce angina pectoris and myocardial infarction. However, it seldom causes stomach upset reaction or affects liver and kidney functions. The safety of Levothyroxine Sodium Tablet is high, which does not exclude that some patients are intolerant to the drug and experience stomach upset and impairment of liver and kidney functions. Therefore, liver and kidney function may be monitored on a follow-up basis when Levothyroxine Sodium Tablet is first started. Levothyroxine Sodium Tablet is contraindicated in patients with allergy, non-hypothyroid heart failure, and tachyarrhythmia. After taking Levothyroxine Sodium Tablet discomfort symptoms should go to the hospital for prompt treatment.