Euthyrox 100 Tablet contains Levothyroxine sodium 100 mcg, a synthetic form of the thyroid hormone thyroxine (T4), used primarily to treat hypothyroidism, a condition where the thyroid gland does not produce enough hormones. By supplementing the body's natural hormone levels, Euthyrox helps restore normal metabolism, energy levels, and overall physiological balance. It is commonly prescribed for patients with an underactive thyroid, including those with Hashimoto's thyroiditis, thyroidectomy, or congenital hypothyroidism. Additionally, it may be used to manage certain types of goiter and to suppress thyroid-stimulating hormone (TSH) in thyroid cancer treatment. The medication should be taken orally, usually once daily on an empty stomach, preferably 30 to 60 minutes before breakfast, to ensure optimal absorption. Dosage is individualized based on patient response and thyroid function tests, and regular monitoring is essential to avoid under- or over-treatment, which can lead to symptoms such as fatigue, weight changes, palpitations, or osteoporosis. Patients should inform their healthcare provider about any other medications or health conditions to prevent potential interactions. Euthyrox 100 is a vital therapy for maintaining normal thyroid function and improving quality of life in individuals with thyroid hormone deficiency.