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In Graves' disease, treatment with antithyroid medications must be given for six months to two years, in order to be effective. Even then, upon cessation of the drugs, the hyperthyroid state may recur. Side effects of the antithyroid medications include a potentially fatal reduction in the level of white blood cells.
Propylthiouracil (PTU) is a medication used to treat hyperthyroidism. [3] This includes hyperthyroidism due to Graves' disease and toxic multinodular goiter. [3] In a thyrotoxic crisis it is generally more effective than methimazole. [3] Otherwise it is typically only used when methimazole, surgery, and radioactive iodine is not possible. [3]
Treatment with antithyroid medications must be administered for six months to two years to be effective. Even then, upon cessation of the drugs, the hyperthyroid state may recur. The risk of recurrence is about 40–50%, and lifelong treatment with antithyroid drugs carries some side effects such as agranulocytosis and liver disease. [27]
The onset of anti-thyroid effect is rapid but the onset of clinical effects on thyroid hormone levels in the blood is much slower. This is because the large store of pre-formed T 3 and T 4 in the thyroid gland and bound to thyroid binding globulin (99% bound) has to be depleted before any beneficial clinical effect occurs.
Thioamides or anti-thyroid drugs are also a class of drugs that are used to control thyrotoxicosis. Thioamides have been incorporated into peptides as isosteres for the amide bond. [ 10 ] Peptide modifications are analogues of the native peptide, which can reveal the structure-activity relationship ( SAR ).
Medications such as beta blockers may control the symptoms, and anti-thyroid medications such as methimazole may temporarily help people while other treatments are having an effect. [1] Surgery to remove the thyroid is another option. [1] This may be used in those with very large thyroids or when cancer is a concern. [1]
Thiamazole is a drug used to treat hyperthyroidism such as in Graves' disease, a condition that occurs when the thyroid gland begins to produce an excess of thyroid hormone. The drug may also be taken before thyroid surgery to lower thyroid hormone levels and minimize the effects of thyroid manipulation.
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