Hyperthyroidism is a metabolic disorder in which the thyroid gland hormones excreted excessively. The most common symptoms of hyperthyroidism are a global increased metabolism, increased heart rate, arrhythmias, insomnia, irritability, nervousness, heat intolerance, weight loss, tremors, tachycardia and, sometimes, a protrusion of the eyeballs. Moreover, hypothyroidism is decreased production of thyroid hormones that, depending on when it occurs, can affect to a greater or lesser extent to the development of vital organs. Idiopathic primary hypothyroidism occurs due to thyroid antibodies, or other cause autoimmune disorders (autoimmune hypothyroidism). Hypothyroidism symptoms of muscle fatigue, shortness of breath or pain in the thyroid area, hair loss, dry skin and rough and progressive deterioration of intellectual activity. Due to the difference between hyperthyroidism and hypothyroidism drug treatment it will also be different and adapted to each patient.