Prazosin Hydrochloride is a synthetic piperazine derivative with hypotensive antiadrenergic properties, Prazosin Hydrochloride reduces peripheral resistance and relaxes vascular smooth muscles as a selective adrenergic alpha-1 antagonist by a mechanism not completely known. It is used in the treatment of heart failure, hypertension, pheochromocytoma, Raynaud’s syndrome, prostatic hypertrophy, and urinary retention. (NCI04) NCI Thesaurus (NCIt) A selective adrenergic alpha-1 antagonist used in the treatment of HEART FAILURE; HYPERTENSION; PHEOCHROMOCYTOMA; RAYNAUD DISEASE; PROSTATIC HYPERTROPHY; and URINARY RETENTION. Medical Subject Headings (MeSH)