Euthyrox is the trade name and Levothyroxine Sodium Tablet is its generic name. Levothyroxine Sodium Tablet produced by different manufacturers have different trade names, but the ingredients are the same and there is no difference. The active ingredient of levothyroxine sodium tablets is levothyroxine (T4), which is consistent with the action of the hormones secreted by the human thyroid gland, and part of which is converted into triiodothyronine (T3) in the liver and kidneys to play a role in the cells, and its unique role is to participate in the growth, development and metabolism of the body. Side effects of the drug are usually not observed when Levothyroxine Sodium Tablet is used correctly and in accordance with the doctor’s instructions. The use of this drug is prohibited for those who are allergic to this drug or the components of the formula, patients with thyrotoxicosis, new myocardial infarction, acute myocarditis. The specific dosage and usage of the above medicines should follow the doctor’s instructions and should not be used on its own to avoid adverse reactions.