Pharmacology and the Nursing Process by Linda Lane Lilley: Practice Exam

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Doxazosin's mechanism of action involves:

  1. Dilating blood vessels

  2. Constricting blood vessels

  3. Blocking nerve signals

  4. Stimulating heart rate

The correct answer is: Dilating blood vessels

Doxazosin is a type of medication known as an alpha blocker. This means that it works by targeting alpha receptors in the body, causing them to relax. By relaxing these receptors in blood vessels, doxazosin leads to dilation, or widening, of these blood vessels. This can help to reduce blood pressure and improve blood flow. Options B, C, and D do not accurately reflect the mechanism of action for doxazosin. Instead of causing constriction, blocking nerve signals, or stimulating heart rate, doxazosin works by promoting vasodilation in blood vessels. Therefore, A is the correct answer.

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