Drug Metabolism · Pharmacology

Which factor is most likely to decrease hepatic drug metabolism in an elderly patient?

  1. Increased liver blood flow after meals
  2. Increased synthesis of CYP450 enzymes by hepatocytes
  3. Increased dietary protein intake
  4. Reduced hepatic mass and decreased enzyme activity
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Correct answer: Reduced hepatic mass and decreased enzyme activity

Aging is associated with a decrease in liver size, a reduction in the number of functioning hepatocytes, and a decline in liver blood flow. These changes lead to a reduced capacity to metabolize drugs, necessitating dose adjustments.

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