Used primarily in the treatment of hyperthyroidism and Graves' disease, this compound functions by inhibiting the synthesis of thyroid hormones. It reduces the production of thyroxine (T4) and triiodothyronine (T3) by blocking the enzyme thyroid peroxidase, which is essential for iodination of tyrosine residues in thyroglobulin. This helps control symptoms such as rapid heart rate, weight loss, and anxiety associated with overactive thyroid function. It is typically prescribed in mild to moderate cases and often used when surgery or radioactive iodine therapy is not immediately suitable. Regular monitoring is required due to potential side effects like liver dysfunction or blood disorders.