Angiotensin II Receptor Blockers (ARBs) are a class of medications primarily used to treat high blood pressure and heart failure. They work by blocking the action of angiotensin II, a potent vasoconstrictor, thus preventing it from binding to its receptors on blood vessels and other tissues. This results in vasodilation, reduced blood pressure, and decreased workload on the heart. ARBs are often prescribed when patients cannot tolerate angiotensin-converting enzyme (ACE) inhibitors.
