How effective are leucovorin injections for treating colon cancer?

Not anti tumor: Leukovorum is used as an adjuvant or modifier of single or combinations of chemotherapeutic agents. It helps to prevent the toxic side effects of a number of chemotherapeutic agents including methotrexate. It also can be used to treat anemia caused by a lack of folic acid. It is added to combination of drugs employed in the supportive care of patients with colon cancer but does not have anticancer effects on diseases such as colon cancer, .