Adrenergic receptor blockers are classified by receptor selectivity—alpha blockers (non-selective, alpha-1 selective, alpha-2 selective) and beta blockers (non-selective, beta-1 selective, beta-2 selective)—with pharmacologic effects determined by which receptor subtype is antagonized. Beta-1 selectivity is clinically significant because it minimizes bronchopulmonary (beta-2-mediated) side effects while providing cardiac effects such as rhythm control, rate control, and blood pressure reduction, and certain agents with combined alpha/beta blocking activity occupy a distinct therapeutic niche, particularly in heart failure and pregnancy-related hypertension.
Adrenergic receptor blockers are classified by receptor selectivity—alpha blockers (non-selective, alpha-1 selective, alpha-2 selective) and beta blockers (non-selective, beta-1 selective, beta-2 sel…