Thyronor 100 mcg is an oral tablet containing Levothyroxine Sodium, a synthetic form of the thyroid hormone thyroxine (T₄). Manufactured by Nuvista Pharma Ltd., it is used to treat hypothyroidism, a condition where the thyroid gland does not produce enough thyroid hormones. Levothyroxine works by supplementing the deficient hormone, thereby regulating metabolism, energy production, and overall growth and development.