SPL Set ID: e921f23b-a9bf-4313-9cfa-f0b29c06f72a

Methimazole (1-methylimidazole-2-thiol) is a white, crystalline substance that is freely soluble in water. It differs chemically from the drugs of the thiouracil series primarily because it has a 5- instead of a 6-membered ring. Methimazole tablet, USP contains 10 mg (87.6 μmol) methimazole, an orally administered antithyroid drug. Each tablet also contains lactose monohydrate, magnesium stearate, pregelatinized starch and talc. The molecular weight is 114.16, and the molecular formula is C 4 H 6 N 2 S. The structural formula is as follows: structure