Proctored Pharmacology ATI Related

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Which drug undergoes extensive first-pass hepatic metabolism?

  • A. Heparin
  • B. Insulin
  • C. Propranolol
  • D. Nitroglycerin
Correct Answer: C

Rationale: Propranolol undergoes extensive first-pass metabolism in the liver. When administered orally, propranolol is extensively metabolized by the liver before reaching systemic circulation, leading to reduced bioavailability. This process is known as first-pass hepatic metabolism, which significantly affects the drug's effectiveness and necessitates higher oral doses compared to other routes of administration.