apixaban

11 DESCRIPTION Apixaban, a factor Xa (FXa) inhibitor, is chemically described as 1-(4- methoxyphenyl)-7-oxo-6-[4-(2-oxopiperidin-1-yl)phenyl]-4,5,6,7-tetrahydro-1H-pyrazolo[3,4 c]pyridine-3-carboxamide.‍‍‍‍‍‍​​​‍​​​​​​ Its molecular formula is C 25 H 25 N 5 O 4 , which corresponds to a molecular weight of 459.5. Apixaban has the following structural formula: Apixaban is a white to off white crystalline powder. At physiological pH (1.2 - 6.8), apixaban does not ionize; its aqueous solubility across the physiological pH range is ~0.04 mg/mL. Apixaban tablets are available for oral administration in strengths of 2.5 mg and 5 mg of apixaban with the following inactive ingredients: anhydrous lactose, microcrystalline cellulose, croscarmellose sodium, sodium lauryl sulfate, and magnesium stearate. The film coating contains lactose monohydrate, hypromellose, titanium dioxide, triacetin, and yellow iron oxide (2.5 mg tablets) or red iron oxide (5 mg tablets). str