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The calcium channel blockers act by blocking the influx of calcium ions into vascular smooth muscle and cardiac muscle cells during membrane depolarization. Because muscle contraction is largely dependent upon influx of calcium, its inhibition causes relaxation, particularly in arterial beds. Thus, the major effects of the calcium channel blockers are relaxation of vascular and arterial smooth Beta blockers - NHS Beta blockers work mainly by slowing down the heart. They do this by blocking the action of hormones like adrenaline. Beta blockers usually come as tablets. They are prescription-only medicines, which means they can only be prescribed by a GP or another suitably qualified healthcare professional. How to Disable a Pop-Up Blocker: Geek Squad - Best Buy

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Beta-blockers are one of the most widely prescribed classes of drugs to treat hypertension (high blood pressure) and are a mainstay treatment of congestive heart failure.Beta-blockers work by