Synonyms for Beta Blocker (same or very similar meaning)
WordNet sense 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):
beta-adrenergic blocker, beta-adrenergic blocking agentFrom the ODE community, based on WordNetadd/edit