Antitumor agent and antitumor effect enhancer

摘要

Provided is a novel cancer treatment method using a combination drug containing FTD and TPI which shows a remarkably excellent antitumor effect with little side effects. An antitumor agent characterized by comprising a combination drug containing Trifluridine and Tipiracil hydrochloride at a molar ratio of 1:0.5, that is to be co-administered with an anti-VEGF antibody or anti-EGFR antibody.