Diltiazem DESCRIPTION NewsLinks Diltiazem HCl is a calcium ion influx inhibitor (slow channel blocker or calcium antagonist). Chemically, diltiazem HCL is 1, 5-benzothiazepin-4(5H)one, 3- (acetyloxy)-5- -2, 3-dihydro-2-(4-methoxyphenyl)-, monohydrochloride, (+)-cis-. Diltiazem hydrochloride is a white to off-white crystalline powder with a bitter taste. It is soluble in water, methanol, and ...

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