(bah-SOO-tih-nib) 
A drug used to treat adults and children aged 1 year and older with chronic myelogenous leukemia that is Philadelphia chromosome positive. It is used in some newly diagnosed patients. It is also used in patients who cannot be treated with or have not gotten better after other treatment. It is also being studied in the treatment of other types of cancer. Bosutinib blocks BCR::ABL1 and other proteins, which may help keep cancer cells from growing. It is a type of tyrosine kinase inhibitor. Also called Bosulif.