iressa - Medication Listings

Gefitinib is a kinase inhibitor. The chemical name of gefitinib is 4-Quinazolinamine N -(3-chloro-4-fluorophenyl)-7-methoxy-6-[3-(4-morpholinyl) propoxy] and the following structural formula: Gefitinib has the molecular formula C 22 H 24 ClFN 4 O 3 , a relative molecular mass of 446.9 daltons and is a white-colored powder. Gefitinib is a free base. The molecule has pK a s of 5.4 and 7.2. Gefitinib can be defined as sparingly soluble at pH 1, but is practically insoluble above pH 7, with the solubility decreasing sharply between pH 4 and pH 6. In non-aqueous solvents, gefitinib is freely soluble in glacial acetic acid and dimethyl sulfoxide, soluble in pyridine, sparingly soluble in tetrahydrofuran, and slightly soluble in methanol, ethanol (99.5%), ethyl acetate, propan-2-ol and acetonitrile. IRESSA ® (gefitinib) tablets are available as brown film-coated tablets, containing 250 mg of gefitinib, for oral administration. The inactive ingredients of the tablet core of IRESSA tablets are lactose monohydrate, microcrystalline cellulose, croscarmellose sodium, povidone, sodium lauryl sulfate and magnesium stearate. The tablet coating is composed of hypromellose, polyethylene glycol 300, titanium dioxide, red ferric oxide and yellow ferric oxide. structural formula for gefitinib