Beta blockers are medications used to treat a wide variety of conditions including angina, hypertension (high blood pressure), congestive heart failure, tachyarrhythmias and migraines. Examples of beta blockers include Bucindolol, Bisoprolol, Metoprolol, and Carvedilol.
They work by blocking the action at beta adrenergic receptors. These receptors normally respond to adrenaline (epinephrine) and other stress hormones. There are three types of beta receptors found in different parts of the body, and some beta blockers are selective for a specific type.