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Antithyroid medicine is often used for hyperthyroidism, because it works more quickly than radioactive iodine therapy. Radioactive iodine therapy destroys part or all of the thyroid gland, depending on the dosage used. But antithyroid medicine does not cause permanent thyroid damage.
You may take antithyroid medicine before you have radioactive iodine treatment or surgery—to bring your metabolism to normal, to make you feel better, or to reduce the chances of more serious problems.
Antithyroid medicine does control hyperthyroidism in many people. But the medicine does have some drawbacks.
Your doctor may prescribe additional medicines to treat symptoms caused by hyperthyroidism, such as rapid heartbeat or dry eyes. These medicines can help you feel better while you wait for another treatment to begin to work.
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