What are the antithyroid drugs used in the treatment of hyperthyroidism?

The correct choice highlights prophylthiouracil and methimazole as antithyroid drugs used in the management of hyperthyroidism. These medications work by inhibiting thyroid hormone synthesis, effectively reducing the production of thyroxine (T4) and triiodothyronine (T3) in the thyroid gland.

Prophylthiouracil is particularly useful because it not only inhibits the synthesis of thyroid hormones but also reduces the peripheral conversion of T4 to T3, making it significant in managing severe hyperthyroidism or in patients who may require rapid control of their symptoms. Methimazole is similarly effective, and it is often preferred in many cases due to its longer half-life, allowing for once-daily dosing.

Understanding the distinct roles of these medications is crucial for effective treatment and management of hyperthyroidism. They play a significant role in scenarios such as preparing patients for surgery or radioiodine treatment and in the management of hyperthyroid symptoms.

The other choices involve different classes of drugs not primarily indicated for treating hyperthyroidism. Propranolol is a beta-blocker that may help alleviate some symptoms of hyperthyroidism, while levothyroxine is a synthetic form of thyroid hormone used in hypothyroidism