SPL Set ID: 2ad47033-76f3-447d-8a44-21479e9164c0

Dutasteride and tamsulosin hydrochloride capsules, USP contain dutasteride (a selective inhibitor of both the type 1 and type 2 isoforms of steroid 5 alpha-reductase, an intracellular enzyme that converts testosterone to DHT and tamsulosin (an antagonist of alpha 1A -adrenoceptors in the prostate). Each dutasteride and tamsulosin hydrochloride capsule, USP contains the following: One dutasteride dull-yellow, opaque, oblong shaped soft gelatin capsule containing clear, colorless to pale yellow viscous oil which is 0.5 mg of dutasteride USP dissolved in a mixture of butylated hydroxytoluene and glycerol monocaprylocaprate type I. The inactive ingredients in the soft-gelatin capsule shell are ferric oxide yellow, gelatin (from certified BSE-free bovine sources), glycerin, and titanium dioxide. Tamsulosin hydrochloride white to off-white beadlets, containing 0.4 mg tamsulosin hydrochloride USP and the inactive ingredients: calcium stearate, methacrylic acid and ethyl acrylate copolymer dispersion, microcrystalline cellulose, talc, and triacetin. The above components are encapsulated in a hard-shell capsule made with the inactive ingredients of black iron oxide, carrageenan, FD&C yellow 6, hypromellose, iron oxide red, potassium chloride, and titanium dioxide. The capsules are imprinted with black ink containing black iron oxide, potassium hydroxide, and shellac. Dutasteride: Dutasteride is a synthetic 4-azasteroid compound chemically designated as (5α,17β)-N-{2,5 bis(trifluoromethyl)phenyl}-3-oxo-4-azaandrost-1-ene-17-carboxamide.The molecular formula of dutasteride is C 27 H 30 F 6 N 2 O 2 , representing a molecular weight of 528.5 with the following structural formula: Dutasteride is a white to pale yellow powder with a melting point is about 242° to 250ºC. It is soluble in ethanol and in methanol, insoluble in polyethylene glycol 400 and in water. Tamsulosin: Tamsulosin hydrochloride is a synthetic compound chemically designated as (-)-( R )-5-[2-[[2-( o -Ethoxyphenoxy)ethyl]amino]propyl]-2-methoxybenzenesulfonamide, monohydrochloride. The molecular formula of tamsulosin hydrochloride is C 20 H 28 N 2 O 5 S•HCl. The molecular weight of tamsulosin hydrochloride is 444.97. Its structural formula is: Tamsulosin hydrochloride is a white or almost white crystalline powder that melts with decomposition at about 234°C. It is freely soluble in formic acid, sparingly soluble in methanol: slightly soluble in water, very slightly soluble in dehydrated alcohol and practically insoluble in ether. FDA approved dissolution test specifications differ from USP. Chemical Structure 1 Chemical Structure 2