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METHIMAZOLE (meth IM a zole) prevents the thyroid gland from producing too much thyroid hormone. It is used to treat a condition known as hyperthyroidism.
PROPYLTHIOURACIL (PTU) (proe pill thye oh YOOR a sill) lowers the amount of thyroid hormone made by the thyroid gland. It treats hyperthyroidism (where the thyroid gland makes too much hormone). It also is used before thyroid surgery or radioactiv...