Kentucky Medication Aide (KMA) State Practice Exam

What effect does a vasodilator have on blood pressure?

1. Increases blood pressure

2. Decreases blood pressure

3. No effect on blood pressure

4. Fluctuates blood pressure

The correct answer is: Decreases blood pressure

A vasodilator has the primary effect of decreasing blood pressure. Vasodilators work by relaxing the smooth muscles in blood vessels, allowing them to widen (dilate). This widening of the blood vessels reduces the resistance that the heart must overcome to pump blood, leading to a decrease in arterial blood pressure. When blood vessels dilate, the volume of the blood moving through a larger space means that the overall pressure within the vascular system is lowered. As a result, conditions requiring management of high blood pressure can see significant benefit from the use of vasodilators. This understanding is essential for those studying medication administration and management of cardiovascular conditions, as it highlights how certain medications can directly influence hemodynamics and vascular resistance.