A child is diagnosed with hyperthyroidism. Which agent would the nurse expect the healthcare provider to prescribe?

A. Mineralocorticoids (e.g., fludrocortisone) are used to treat adrenal insufficiency, not hyperthyroidism. B. Levothyroxine is a synthetic thyroid hormone used to treat hypothyroidism, which is the opposite condition. C. Dexamethasone is a corticosteroid used to reduce inflammation or treat adrenal insufficiency, not to manage thyroid hormone excess. D. Methimazole is an antithyroid medication that inhibits thyroid hormone synthesis, making it the first-line treatment for hyperthyroidism in children, including Graves’ disease. Nurses should monitor for adverse effects such as rash, fever, or signs of infection, which can indicate agranulocytosis.