Abstract: The present invention relates to a pharmaceutical composition for preventing or treating cancer comprising: as active ingredients, (1) an immune checkpoint inhibitor; (2) a biguanide-based compound or a pharmaceutically acceptable salt thereof; (3) 2-deoxy-D-glucose; or further comprising: (4) inositol hexaphosphate or a pharmaceutically acceptable salt thereof, inositol, or a mixture thereof. The compositions according to the present invention not only increase the indicants to various carcinomas for immune checkpoint inhibitors with limited indicants, but also exhibit a synergistic anti-cancer effect by appropriately combining specific drugs, thereby maximizing a therapeutic effect and killing only cancer cells without side effects. Therefore, the compositions of the present invention may be usefully used as anticancer agents for preventing or treating cancer.

Abstract: The present invention relates to a composition comprising, as active ingredients: (1) a biguanide-based compound or a pharmaceutically acceptable salt thereof; (2) 2-deoxy-D-glucose; and (3) inositol hexaphosphate or a pharmaceutically acceptable salt thereof, inositol, or a mixture thereof. The composition according to the present invention exhibits a synergistic anticancer effect by appropriately combining specific drugs having a problem that needs to be used in a large amount, thereby making it possible to kill cancer cells in a small amount and effectively treat the cancer. Furthermore, the composition of the present invention may kill only cancer cells without side effects by exhibiting a specific toxic effect on cancer cells without showing toxicity on normal cells and thus be usefully used as an anticancer agent and for preventing or improving cancer.