(biochemistry) Reducing the production or effects of thyroid hormones.
2005, The American Thyroid Association, "Hyperthyroidism",
Drugs known as antithyroid agents—methimazole (Tapazole®) or propylthiouracil (PTU)—may be prescribed if your doctor chooses to treat the hyperthyroidism by blocking the thyroid gland’s ability to make new thyroid hormone.
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