propylthiouracil (cont.)

PRESCRIBED FOR: PTU is used to manage hyperthyroidism associated with Graves' disease in patients who did not tolerate methimazole, and are not able to receive surgery or radioactive iodine therapy. It also is used to decrease symptoms of hyperthyroidism in preparation for surgical removal of the thyroid gland or before radioactive iodine therapy in patients who did not tolerated methimazole.

SIDE EFFECTS: The most common side effects are related to the skin, such as:

Other important side effects include:

Less common but serious side effects have occurred with PTU therapy. A decrease of white blood cells in the blood (agranulocytosis) may occur. Symptoms and signs of agranulocytosis include infectious lesions of the throat, the gastrointestinal tract, and skin with an overall feeling of illness and fever.

A decrease in blood platelets (thrombocytopenia) also may occur. Since platelets are important for the clotting of blood, thrombocytopenia may lead to excessive bleeding. Severe liver injury and acute liver failure, in some cases fatal, have been associated with PTU. Some adults and pediatric patients required liver transplantation.

Medically Reviewed by a Doctor on 1/13/2015

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