同义词： alpha blocker alpha-adrenergic blocker alpha-adrenergic blocking agent
N（名词） any of a class of drugs that prevent the stimulation of alpha adrenoceptors, a type of receptor in the sympathetic nervous system, by adrenaline and noradrenaline and that therefore cause widening of blood vessels: used in the treatment of high blood pressure and prostatic hyperplasia 阿尔法神经阻断剂