THYRO 3 is a brand of Liothyronine Sodium, a hormone replacement therapy used to treat hypothyroidism. It helps to restore hormone levels and manage symptoms such as fatigue, weight gain, depression, and constipation. This medication is available in tablet form and is taken orally. It is important to take THYRO 3 exactly as prescribed by your doctor. With proper use, it can help you manage your hypothyroidism and improve your quality of life.