Pharmacology · single question

What is the mechanism of action of lisinopril (full options)?

  1. Flushes out water and sodium
  2. Blocks calcium channels
  3. Inhibits narrowing of blood vessels and decreases the heart's workload
Show answer and explanation

Correct answer: C. Inhibits narrowing of blood vessels and decreases the heart's workload

Lisinopril is an ACE inhibitor (vasodilation, reduced cardiac workload).
  • A. That is a diuretic mechanism, not an ACE inhibitor.
  • B. That is a calcium-channel blocker.
  • C. Correct. As an ACE inhibitor, lisinopril blocks angiotensin II formation → vasodilation → reduced afterload/workload.

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