beta blocker

(Medicine) drug that blocks stress hormones by hindering the activity of beta receptors in the body (used to treat hypertension, angina, and other heart conditions)

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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Beta blocker A drug that can be used to reduce blood pressure. Mentioned in: Mitral Valve Stenosis beta blocker Beta-adrenergic blocking agent [more]Beta blocker - Community and Resources

Noun
1. any of various drugs used in treating hypertension or arrhythmia; decreases force and rate of heart contractions by blocking beta-adrenergic receptors of the autonomic nervous system
(synonym) beta-adrenergic blocker, beta-adrenergic blocking agent
(hypernym) blocker, blocking agent
(hyponym) acebutolol, Sectral

a drug (eg thalidomide) which inhibits the growth of blood vessels. Currently being studied as a cancer cure, with possible benefits in the field of macular degeneration.