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- noun pharmacology A blocking agent, one of a class of drugs used to treat
hypertensionand control the rate at which the heartbeats.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun 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
from Wiktionary, Creative Commons Attribution/Share-Alike License
From action of drug which blocks beta-adrenergic receptors.
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