Class/mechanism: Pyrimidine analog, antimetabolite, inhibitor of thymidylate synthase. When given by rapid intraarterial injection, it is rapidly catabolized in vivo to fluorouracil (5-FU), which is metabolized to 5-fluoro-2'-deoxyuridine monophosphate (FdUMP) and 5-fluorouridine triphosphate (FUTP). FdUMP inhibits DNA synthesis by binding to thymidylate synthase and inhibiting production of thymidylate; FUTP interferes with RNA processing when it is mistakenly incorporated in place of uridine triphosphate (UTP). When FUDR is given by continuous intraarterial infusion, direct anabolism to FUDR-monophosphate is enhanced, which increases the inhibition of DNA.
Route: IA (intraarterial)
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Patient drug information
- Floxuridine (FUDR) patient drug information (Chemocare)
- Floxuridine (FUDR) patient drug information (UpToDate)
History of changes in FDA indication
- 12/18/1970: Initial FDA approval