Endocrine pharmacotherapy · USMLE Step 1

A patient with hyperprolactinemia is treated with bromocriptine. What is the mechanism of action?

  1. Dopamine antagonist
  2. Dopamine agonist
  3. Estrogen receptor antagonist
  4. TRH inhibitor
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Correct answer: Dopamine agonist

Bromocriptine is a dopamine agonist that inhibits prolactin secretion from the anterior pituitary.

Difficulty: Medium Question 10 of 20

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