Tapazole® 10 mg is an oral antithyroid medication containing methimazole, designed to manage hyperthyroidism by inhibiting the synthesis of thyroid hormones. Methimazole achieves this by blocking the enzyme thyroid peroxidase, which plays a crucial role in the iodination of tyrosine residues in thyroglobulin, a key step in the production of thyroxine (T₄) and triiodothyronine (T₃) . This action helps reduce elevated thyroid hormone levels, alleviating symptoms associated with hyperthyroidism