Pharmacology · single question

What is the mechanism of action of statins (on the patient's medication list)?

  1. Inhibit HMG-CoA reductase
  2. Inhibit cholesterol absorption in the gut
  3. Bind bile acids
  4. Activate lipoprotein lipase
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Correct answer: A. Inhibit HMG-CoA reductase

  • A. Correct. Statins competitively inhibit HMG-CoA reductase, the rate-limiting enzyme in hepatic cholesterol synthesis, lowering LDL.
  • B. Cholesterol-absorption inhibition describes ezetimibe.
  • C. Bile-acid binding describes resins like cholestyramine.
  • D. Activating lipoprotein lipase is not the statin mechanism.

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