Infigratinib mesylate, also known as, BGJ398 mesylate or NVP-BGJ398 mesylate, is a pan FGFR kinase inhibitor, and is an orally bioavailable pan inhibitor of human fibroblast growth factor receptors (FGFRs) with potential antiangiogenic and antineoplastic activities. pan FGFR kinase inhibitor BGJ398 selectively binds to and inhibits the activities of FGFRs, which may result in the inhibition of tumor angiogenesis and tumor cell proliferation, and the induction of tumor cell death. Infigratinib mesylate was approved in 2021 to treat adults with cholangiocarcinoma whose disease meets certain criteria.