Levothyroxine Sodium Tablet is a thyroid hormone medicine, the efficacy and function is to replenish the thyroid hormone in the body. Levothyroxine Sodium Tablet is indicated for congenital hypothyroidism and hypothyroidism due to various reasons, as well as for suppressive treatment after thyroid cancer surgery. An overdose of Levothyroxine Sodium Tablet can lead to symptoms such as cardiac arrhythmia, diarrhea, vomiting, headache, insomnia, and weight loss. In addition, it should be noted that levothyroxine sodium tablets are contraindicated in allergy to the drug, acute myocardial infarction, acute myocarditis and acute total carditis. The dosage of levothyroxine sodium tablets needs to be taken strictly under the guidance of a physician, and cannot be discontinued or overdosed.