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.

synonyms: beta-adrenergic blocking agent, beta-blocking agent, beta blocker.

Polish: beta bloker, lek beta-adrenolityczny, beta-bloker, betabloker, lek β-sympatykolityczny, β-bloker