NCI Drug Dictionary
The NCI Drug Dictionary contains technical definitions and synonyms for drugs/agents used to treat patients with cancer or conditions related to cancer. Each drug entry includes links to check for clinical trials listed in NCI's List of Cancer Clinical Trials.
- topical fluorouracil
A topical formulation containing the antimetabolite 5-fluorouracil (5-FU), with antineoplastic activity. Upon topical administration, 5-FU is converted into the active metabolite 5-fluoroxyuridine monophosphate (F-UMP), which competes with uracil during RNA synthesis and inhibits RNA processing. Conversion of 5-FU into another active metabolite, 5-5-fluoro-2'-deoxyuridine-5'-O-monophosphate (F-dUMP), inhibits thymidylate synthase; this results in the depletion of thymidine triphosphate (TTP), one of the four nucleotide triphosphates used in DNA synthesis, and thus inhibits DNA synthesis. Altogether, this prevents the proliferation of tumor cells locally. Check for active clinical trials using this agent. (NCI Thesaurus)
US brand name: Carac
Foreign brand name: Actino-Hermal
Abbreviation: 5-FU topical