SPL Set ID: 44bfe5d7-a56a-46f1-8ef3-ad386ab35f0f
1 drug(s) with this SPL Set ID
Doxazosin tablets, USP are a quinazoline compound that is a selective inhibitor of the alpha 1 subtype of alpha -adrenergic receptors. The chemical name of doxazosin mesylate is 1-(4-amino-6,7-dimethoxy-2-quinazolinyl)-4-(1,4-benzodioxan-2-ylcarbonyl)piperazine methanesulfonate. The molecular formula for doxazosin mesylate is C 23 H 25 N 5 O 5 . CH 4 O 3 S and the molecular weight is 547.58. It has the following structure: Doxazosin mesylate, USP is freely soluble in dimethylsulfoxide, soluble in dimethylformamide, slightly soluble in methanol, ethanol, and water (0.8% at 25°C), and very slightly soluble in acetone and methylene chloride. Doxazosin tablets are available as colored tablets for oral use and contains 1 mg (orange), 2 mg (blue), 4 mg (gray) and 8 mg (white to off-white) of doxazosin as the free base. The inactive ingredients for all tablets are: lactose monohydrate, magnesium stearate, microcrystalline cellulose, sodium lauryl sulfate, sodium starch glycolate. The 1 mg tablet contains FD & C Yellow No: 6 Aluminium Lake;the 2 mg tablet contains FD & C Blue # 2/ Indigo Carmine Al(11 - 14%); the 4 mg tablet contains FD & C Yellow No: 6 Aluminium Lake and FD & C Blue # 2/ Indigo Carmine Al(11 - 14%). FDA approved dissolution test specifications differ from USP. Chemical Structure