alpha-blocker

Definition / meaning of alpha-blocker

A substance that relaxes muscle tissue in blood vessels and in the prostate gland, which improves the flow of urine and blood. Alpha-blockers are used to treat the symptoms of many conditions, such as benign prostatic hyperplasia (BPH), high blood pressure, and some blood circulation problems. Also called alpha-adrenergic antagonist.

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Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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