Definition: The term "chloranthyroxine" is a medication used to treat hyperthyroidism, which is an abnormal condition of the thyroid gland. It is commonly prescribed for people with hypothyroidism who want to get their thyroid levels back in check. Chloranthyroxine works by suppressing the production of thyroid hormones (T4 and T3) and stimulating the production of thyroxine (T4), a hormone that helps regulate metabolism. This medication can be taken either as a