Beta blockers (sometimes written as β-blockers) are a class of
drugs used for various indications, but particularly for the management of
cardiac arrhythmias and cardioprotection after
myocardial infarction. Whilst once first-line treatment for
hypertension, their role was downgraded in June 2006 in the
United Kingdom to fourth-line as they do not perform as well as other drugs, particularly in the elderly, and there is increasing evidence that the most frequently used beta-blockers especially in combination with thiazide-type diuretics carry an unacceptable risk of provoking
type 2 diabetes.
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A class of drugs that block the action of adrenaline (a beta adrenergic substance) and can relieve stress to the heart muscle. Beta blockers are often used to slow the heart rate or lower the blood pressure.