SPL Set ID: 976d9dd0-4f11-4439-b84e-0c0f0e018d8b

Diltiazem hydrochloride is a calcium ion cellular influx inhibitor (slow channel blocker or calcium antagonist). Chemically, diltiazem hydrochloride is 1, 5-Benzothiazepin-4(5 H )-one, 3-(acetyloxy)-5-[2-(dimethylamino)ethyl]-2, 3-dihydro-2-(4-methoxyphenyl)-, monohydrochloride,(+)- cis -. The chemical structure is: Diltiazem hydrochloride, USP is a white, odorless crystalline powder or small crystals. It is freely soluble in chloroform, formic acid, methanol, and water. It is sparingly soluble in dehydrated alcohol and is insoluble in ether. It has a molecular weight of 450.98. Diltiazem hydrochloride is formulated as a once-a-day extended-release capsule containing 120 mg diltiazem hydrochloride, USP (equivalent to 110.3 mg diltiazem), 180 mg diltiazem hydrochloride, USP (equivalent to 165.45 mg diltiazem), 240 mg diltiazem hydrochloride, USP (equivalent to 220.6 mg diltiazem), 300 mg diltiazem hydrochloride, USP (equivalent to 275.75 mg diltiazem), or 360 mg diltiazem hydrochloride, USP (equivalent to 330.9 mg diltiazem). The 120 mg, 180 mg, 240 mg, 300 mg and 360 mg capsules also contain: acetyl tributyl citrate, ammonio methacrylate copolymer dispersion, hypromellose, sodium lauryl sulfate, sugar spheres (sucrose and corn starch), and talc. The 120 mg, 180 mg, 240 mg, 300 mg, and 360 mg capsule shells contain FD&C Blue #1, gelatin, sodium lauryl sulfate, and titanium dioxide. The 180 mg, 240 mg, 300 mg, and 360 mg capsule shells also contain iron oxide black. The 120 mg, 180 mg, 300 mg, and 360 mg capsules are imprinted with black ink which contains iron oxide black, potassium hydroxide, propylene glycol, and shellac. The 240 mg capsules are imprinted with white ink which contains potassium hydroxide, propylene glycol, shellac, and titanium dioxide. For oral administration. Meets USP dissolution test 29. chemical structure