Which medications in the drug class Antidote, Folic Acid Antagonist are used in the treatment of Colon Cancer?

Updated: Apr 15, 2020
  • Author: Tomislav Dragovich, MD, PhD; Chief Editor: N Joseph Espat, MD, MS, FACS  more...
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Antidote, Folic Acid Antagonist

These agents counteract the toxic effects of the chemotherapeutic drug.


Reduced form of folic acid that does not require enzymatic reduction reaction for activation. Allows for purine and pyrimidine synthesis, both of which are needed for normal erythropoiesis. Current standard therapy for colon cancer involves combination chemotherapy. Binds to and stabilizes ternary complex of FdUTP (intracellular active metabolite of fluoropyrimidines) and thymidylate synthetase (TS), augmenting cytotoxic effects of 5-fluorouracil. Used as an adjunct to fluorouracil.

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