What are beta-blockers?
Beta-blocker drugs treat a variety of conditions by 'blocking' the transmission of certain nerve impulses. The ends of some nerves release a chemical when the nerve is stimulated. The beta-blocker drug 'sits' on certain receptors and stops (or blocks) them from being stimulated. So, for example, if beta-receptors in the heart are blocked, the force and rate of the heart beat is reduced.
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