Eltrombopag Olamine

11 DESCRIPTION Eltrombopag tablets contain eltrombopag olamine, a small molecule thrombopoietin (TPO) receptor agonist for oral administration.‍‍‍‍‍‍​​​‍​​​​​​ Eltrombopag olamine is a biphenyl hydrazone. The chemical name for eltrombopag olamine is 3'-{(2Z)-2-[1-(3,4-dimethylphenyl)-3-methyl-5-oxo-1,5-dihydro-4H-pyrazol-4-ylidene]hydrazino}-2'-hydroxy-3-biphenylcarboxylic acid-2-aminoethanol (1:2). It has the molecular formula C 25 H 22 N 4 O 4 • 2(C 2 H 7 NO). The molecular weight is 564.65 g/mol for eltrombopag olamine and 442.48 g/mol for eltrombopag free acid. Eltrombopag olamine has the following structural formula: Eltrombopag olamine is a brown to red color solid, and is slightly soluble in methanol and practically insoluble in cyclohexane. Each eltrombopag tablet contains eltrombopag olamine in the amount of 15.95 mg, 31.90 mg, 63.80 mg or 95.70 mg equivalent to 12.5 mg, 25 mg, 50 mg or 75 mg of eltrombopag free acid respectively. The inactive ingredients of eltrombopag tablets are: Tablet Core: magnesium stearate, mannitol, microcrystalline cellulose, povidone and sodium starch glycolate. Coating: D&C red no. 27 (25 mg tablet), D&C yellow no. 10 (25 mg tablet), FD&C blue no. 1 (25 mg and 50 mg tablet), FD&C blue no. 2 (50 mg tablet), ferrosoferric oxide (75 mg tablet), hypromellose, iron oxide red (75 mg tablet), iron oxide yellow (75 mg tablet), polyethylene glycol, titanium dioxide. structure