THYRONORM 100 mcg Tablet is a thyroid hormone replacement medicine containing Levothyroxine Sodium, a synthetic form of thyroxine (T4), which is similar to the hormone naturally produced by the thyroid gland. It is used for the management of hypothyroidism (underactive thyroid), a condition in which the thyroid gland does not produce enough thyroid hormones. THYRONORM helps restore thyroid hormone levels and supports normal metabolism, energy regulation, and overall thyroid function when taken as prescribed by a healthcare professional.