Lapatinib Ditosylate

**Semantic type:** Pharmacologic Substance

**Definition:** The ditosylate salt of lapatinib, a synthetic, orally-active quinazoline with potential antineoplastic activity. Lapatinib reversibly blocks phosphorylation of the epidermal growth factor receptor (EGFR), ErbB2, and the Erk-1 and-2 and AKT kinases; it also inhibits cyclin D protein levels in human tumor cell lines and xenografts. EGFR and ErbB2 have been implicated in the growth of various tumor types.

**Synonyms:** - 4-Quinazolinamine, N-(3-chloro-4-((3-fluorophenyl)methoxy)phenyl)-6-(5-(((2-(methylsulfonyl)ethyl)amino)methyl)-2-furanyl), bis(4-methylbenzenesulfonate), Monohydrate - LAPATINIB DITOSYLATE - Tykerb - Tykerb - lapatinib ditosylate