Description
TAS-102 is a combination drug composed of the cytotoxic pyrimidine analog Trifluridine (5-trifluoro-2'-deoxythymidine or TFT) and a thymidine phosphorylase inhibitor (TPI) tipiracil hydrochloride, in a molar ratio of 1.0:0.5 (TFT:TPI). TAS-102 is used as a third- or fourth-line treatment of metastatic colorectal cancer