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Medical Definition of Phenoxybenzamine hydrochloride
1. (2-Chloroethyl)-N-(1-methyl-2-phenoxyethyl benzylamine hydrochloride;a potent adrenergic (alpha-receptor) blocking agent of the beta-haloalkylamines; selectively blocks the excitatory response of smooth muscle and exocrine glands to epinephrine; used in the treatment of peripheral vascular diseases and in pheochromocytoma. (05 Mar 2000)