NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 8,468 terms related to cancer and medicine.
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- beta-adrenergic blocking agent
- listen (BAY-tuh-A-dreh-NER-jik BLAH-king AY-jent)
- A type of drug that blocks the action of substances, such as adrenaline, on nerve cells and causes blood vessels to relax and dilate (widen). This allows blood to flow more easily and lowers blood pressure and the heart rate. Beta-adrenergic blocking agents are used to treat high blood pressure, chest pain (angina), abnormal heart rate (arrhythmia), congestive heart failure, and several other conditions. They may also shrink certain types of vascular tumors, such as hemangiomas. Also called beta-adrenergic antagonist and beta-blocker.