SPL Set ID: fea187a3-ee8b-4463-8485-3b1de1504609

Prazosin hydrochloride, USP a quinazoline derivative, is the first of a new chemical class of antihypertensives. It is the hydrochloride salt of 1-(4-amino-6,7-dimethoxy- 2-quinazolinyl)-4-(2-furoyl) piperazine and its structural formula is: Molecular formula C 19 H 21 N 5 O 4• HCl It is a white to tan powder, slightly soluble in methanol, in dimethyl formamide, in dimethyl acetamide, very slightly soluble in alcohol, practically insoluble in chloroform and in acetone. It has a molecular weight of 419.87. Each capsule for oral administration contains prazosin hydrochloride, USP equivalent to 1 mg, 2 mg or 5 mg of prazosin. Inert ingredients in the formulations are: sucrose, corn starch, sodium lauryl sulfate, microcrystalline cellulose, colloidal silicon dioxide and magnesium stearate. The empty hard gelatin capsule shell contains gelatin and titanium dioxide. In addition, the 2 mg and 5 mg empty hard gelatin capsule shell also contain FD&C Blue 1 and FD&C Red 3. The empty hard gelatin capsule shells are imprinted with edible black ink containing shellac, potassium hydroxide and black iron oxide. FDA approved dissolution test specifications differ from USP. structure