What Does Propylthiouracil Treat?

What Does Propylthiouracil Treat? Propylthiouracil is used to treat hyperthyroidism (a condition that occurs when the thyroid gland produces too much thyroid hormone, speeding the body’s metabolism, and causing certain symptoms) in adults and children 6 years of age or older. What is the action of propylthiouracil? Mechanism of Action Propylthiouracil inhibits the production of