This invention relates to a pharmaceutical composition comprising 5-chloro-N4-[2-(dimethylphosphoryl)phenyl]-N2-{2-methoxy-4-[4-(4-methylpiperazin-1-yl)piperidin-1-yl]phenyl}pyrimidine-2,4-diamine as the active pharmaceutical ingredient, and therapeutic uses of the pharmaceutical formulation. In particular, the invention is directed to tablets comprising the pharmaceutical composition, methods of preparing the tablets, and therapeutic uses thereof.本發明係關於一種包含5-氯-N4-[2-(二甲基磷醯基)苯基]-N2-{2-甲氧基-4-[4-(4-甲基哌嗪-1-基)哌啶-1-基]苯基}嘧啶-2,4-二胺作為活性醫藥成分之醫藥組成物及該醫藥調配物之治療用途。特定言之,本發明針對包含該醫藥組成物之錠劑、製備該等錠劑之方法及其治療用途。