The patient is receiving doxazosin (Cardura) for hypertension. He asks the nurse how the medication works. What is the nurse's best response?
1. "It works by causing your kidneys to excrete more urine."
2. "It works by making your heart work more efficiently."
3. "It works by making your blood vessels expand."
4. "It works by decreasing the release of your stress hormones."
Correct Answer: 3
Rationale: Doxazosin (Cardura) is selective for blocking alpha1-receptors in vascular smooth muscle, which results in dilation of arteries and veins. Excreting more urine is an effect of diuretic medications. Increasing the efficiency of the heart is not an effect of doxazosin (Cardura). Decreasing the release of stress hormones is not an effect of doxazosin (Cardura).
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