Question

a client being treated for hyperthyroidism with propylthiouracil (ptu) asks the nurse how the medication works. which is the best response to give the client?

a it inhibits the synthesis of t3 and t4 by the thyroid gland.

b it decreases the amount of thyroid - stimulating hormone circulating in the blood.

c it enhances the amount of t4 and diminishes the amount of t3 produced by the thyroid.

d it increases the amount of thyroid - stimulating hormone circulating in the blood.

Explanation:

Propylthiouracil (PTU) is an antithyroid medication. Its primary mechanism of action is blocking the thyroid gland's ability to synthesize the active thyroid hormones T3 and T4, which reduces excessive hormone production in hyperthyroidism. Options B and D are incorrect because PTU does not affect thyroid-stimulating hormone (TSH) levels directly (TSH is released from the pituitary gland). Option C is wrong as PTU does not enhance T4 production.

Answer:

A. It inhibits the synthesis of T3 and T4 by the thyroid gland.