Ace Pharmacology & Nursing Process 2025 – Dive in with Linda Lane Lilley!

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What is the primary action of direct-acting vasodilators?

They increase heart rate.

They cause peripheral vasodilation.

Direct-acting vasodilators work directly on smooth muscle cells in the walls of blood vessels, causing them to relax and widen. This results in peripheral vasodilation, or a decrease in blood pressure. Options A, C, and D are incorrect because they describe actions that are not associated with direct-acting vasodilators. Option A suggests increasing heart rate, but vasodilators actually decrease heart rate as a result of decreased blood pressure. Option C mentions decreasing blood sugar levels, which is not a known effect of direct-acting vasodilators. Option D mentions improving renal function, but this is not the primary action of direct-acting vasodilators.

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They decrease blood sugar levels.

They improve renal function.

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