这个词是什么意思？
A nonselective alpha-adrenergic antagonist. It is used in the treatment of hypertension and hypertensive emergencies, pheochromocytoma, vasospasm of RAYNAUD DISEASE and frostbite, clonidine withdrawal syndrome, impotence, and peripheral vascular disease.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D010646 · MeSH 2026。
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