Lapatinib Ditosylate(Tykerb,Tyverb,GW-572016)(25毫克)产品是Lapatinib is a potent inhibitor of EGFR kinase (Ki = 3 nM), ErbB-2 kinase (Ki = 13 nM), ErbB-4 kinase (Ki = 347 nM). Lapatinib can restore tamoxifen sensitivity in tamoxifen-resistant, ER-positive breast cancer models.