Agranulocytosis is the most severe adverse effect of antithyroid drug therapy ... were all substantially higher in the group that received 30 mg methimazole per day than in the 15 mg per day ...

With hyperthyroidism (overactive thyroid), two antithyroid drugs are used to tamp down the overproduction of T3 and T4 by the ...

Mothers with active Graves' disease should be treated with antithyroid drugs, which impact both maternal and fetal thyroid function. Optimally, the lowest possible dose should be used to maintain ...