Neuro-pharmacology · USMLE Step 1

A man with Parkinson disease is prescribed entacapone. What is its therapeutic mechanism?

  1. Dopamine receptor agonism
  2. Inhibition of MAO-B
  3. Inhibition of COMT
  4. Anticholinergic activity
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Correct answer: Inhibition of COMT

Entacapone inhibits COMT, prolonging levodopa activity and improving motor symptoms.

Difficulty: Medium Question 16 of 20

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