imatinib
noun
imat·i·nib
| \ i-ˈma-tə-ˌnib
\
\
variants:
or imatinib mesylate
Medical Definition of imatinib
: an anticancer drug taken orally in the form of its mesylate C29H31N7O·CH4O3S to treat chronic myelogenous leukemia and metastatic or unresectable gastrointestinal stromal tumors
Note: Imatinib acts by inhibiting the abnormal tyrosine kinase produced by the Philadelphia chromosome. It is marketed under the trademark Gleevec.