A woman is started on propylthiouracil (PTU). What is the primary mode of action for propylthiouracil?
A) Destroys part of the thyroid gland
B) Inhibits production of thyroid hormone
C) Suppresses the anterior pituitary hormones
D) Stimulates the thyroid cells
B
Feedback:
The thioamide drugs inhibit synthesis of thyroid hormone. Iodine preparations inhibit the release of thyroid hormones and cause them to be stored within the thyroid gland. Propylthiouracil does not destroy part of the thyroid gland. Propylthiouracil does not suppress the anterior pituitary hormones. Propylthiouracil does not sedate the central nervous system or suppress the cardiac output.
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