Thyroid medications are designed to either supplement deficient thyroid hormones or inhibit the production of excess hormones. For hypothyroidism, the most commonly prescribed medication is [levothyroxine](#), a synthetic form of the thyroid hormone thyroxine (T4). For hyperthyroidism, medications such as [methimazole](#) or [propylthiouracil](#) are used to reduce the production of thyroid hormones.
