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Medical Definition of Diltiazem hydrochloride
1. 1,5-Benzothiazepin-4(5H)one,3-(acetyloxy)-5-[2-(dimethylamino)ethyl]-2,3-dihydro-2-(4-methoxyphenyl)-monohydrochloride, (+)-cis-;a calcium channel blocking agent used as a coronary vasodilator and antihypertensive. (05 Mar 2000)