SPL Set ID: 6f71ba5e-7bd6-409a-80c6-2f22d975aefc

Diltiazem hydrochloride is a calcium ion cellular influx inhibitor (slow channel blocker or calcium antagonist). Chemically, diltiazem hydrochloride is 1,5-benzothiazepin-4(5H)one, 3-(acetyloxy)-5-[2-(dimethylamino) ethyl]-2,3-dihydro-2-(4-methoxyphenyl)-, monohydrochloride,(+)-cis-. The chemical structure is: Diltiazem hydrochloride is a white to off-white crystalline powder with a bitter taste. It is soluble in water, formic acid, methanol, and chloroform. It has a molecular weight of 450.98. Diltiazem hydrochloride extended-release capsule, USP (Once-a-day dosage) is formulated as a once-a-day extended-release capsule containing 120 mg diltiazem hydrochloride (equivalent to 110.3 mg diltiazem), 180 mg diltiazem hydrochloride (equivalent to 165.45 mg diltiazem), 240 mg diltiazem hydrochloride (equivalent to 220.6 mg diltiazem), 300 mg diltiazem hydrochloride (equivalent to 275.75 mg diltiazem), or 360 mg diltiazem hydrochloride (equivalent to 330.9 mg diltiazem). The 120 mg, 180 mg, 240 mg, 300 mg and 360 mg contain: sugar spheres, hypromellose, talc, ethylcellulose, triethyl citrate, ammonio methacrylate copolymer dispersion type B, acetyl tributyl citrate, polysorbate 80, and magnesium stearate. The capsule shells contain gelatin, sodium lauryl sulfate, titanium dioxide, FD & C Blue 1 and iron oxide black (180 mg, 240 mg, 300 mg and 360 mg). Imprinting ink contains shellac, dehydrated alcohol, isopropyl alcohol, butyl alcohol, propylene glycol, strong ammonia solution, black iron oxide, potassium hydroxide, and purified water. For oral administration. FDA approved dissolution test specifications differ from USP. structure