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Healthy and Unhealthy Blood Vessel
Some blood pressure medications work by increasing vessel dilation and blood flow. Blood pressure medications are grouped into several classes. Each class works in a different way to lower blood pressure. One example is the ACE inhibitors (e.g., enalapril, lisinopril, ramipril). This class of medications works by blocking the body's production of a substance that tightens the blood vessels. As a result, the blood vessels become more relaxed, and the pressure inside the vessels decreases. Angiotensin II receptor blockers (e.g., candesartan, losartan, valsartan) is another group that works in a similar way as the ACE inhibitors. But instead of blocking the production of the blood vessel-tightening substance, it stops the substance from working on the blood vessels. This causes the blood vessels to relax and the blood pressure to decrease.
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