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Pharmacology · Cardiovascular drugs: bempedoic acid
Sample itemA patient with coronary disease cannot tolerate statins because of myalgia, and LDL remains high on ezetimibe. Which oral drug inhibits an enzyme upstream of HMG-CoA reductase in the liver but is not activated in muscle?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
B. Bempedoic acid
Bempedoic acid is a prodrug activated only in the liver, where it inhibits ATP citrate lyase, an enzyme upstream of HMG-CoA reductase in cholesterol synthesis. Muscle lacks the activating enzyme, so myopathy is less common.
Option by option
A. Niacin
Niacin lowers VLDL production and does not inhibit cholesterol synthesis.
B. Bempedoic acid (correct)
Correct. It inhibits ATP citrate lyase and is activated only in the liver.
C. Fenofibrate
Fenofibrate acts through PPAR-alpha to lower triglycerides.
D. Colestipol
Colestipol binds bile acids in the gut and acts by a different mechanism.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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