Abirateronedrug info

Abiraterone acetate, the active ingredient of abiraterone acetate tablets USP is the acetyl ester of abiraterone. Abiraterone is an inhibitor of CYP17 (17α-hydroxylase/C17,20-lyase). Each abiraterone acetate tablet USP contains 250 mg or 500 mg of abiraterone acetate. Abiraterone is designated chemically as 17-(Pyridin-3-yl)androsta-5,16-dien-3β-yl acetate and its structure is: Abiraterone acetate is a white to off-white, non-hygroscopic, crystalline powder. Its molecular formula is C 26 H 33 NO 2 and it has a molecular weight of 391.55. Abiraterone acetate is a lipophilic compound with an octanol-water partition coefficient of 3.57 (Log P) and Freely soluble in methylene chloride, in tetrahydrofuran, and in toluene, soluble in methanol, in ethanol, in ethyl acetate, in isobutyl methyl ketone, in N,N-dimethyl formamide and in acetone, sparingly soluble in acetonitrile and in dimethyl sulfoxide, slightly soluble in hexane, very slightly soluble in 0.1N hydrochloride and practically insoluble in water. The pKa value of abiraterone Acetate is 3.06. Abiraterone acetate tablets USP are available in 500 mg film-coated tablets and 250 mg uncoated tablets with the following inactive ingredients: 500 mg film-coated tablets: colloidal silicon dioxide, croscarmellose sodium, hydroxypropyl methylcellulose, lactose monohydrate, magnesium stearate, microcrystalline cellulose and sodium lauryl sulfate. The film-coating contains iron oxide black, iron oxide red, polyethylene glycol, polyvinyl alcohol, talc, and titanium dioxide. 250 mg uncoated tablets: colloidal silicon dioxide, croscarmellose sodium, lactose monohydrate, magnesium stearate, microcrystalline cellulose, povidone, and sodium lauryl sulphate. 250 mg uncoated tablets: FDA approved dissolution test specifications differ from USP. 500 mg film-coated tablets: Meets USP dissolution test 3. abiraterone-structure