THYRONORM 25 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 where the body does not produce enough thyroid hormone. THYRONORM helps restore thyroid hormone levels and supports normal metabolism, energy regulation, and overall thyroid function when used as prescribed by a healthcare professional.