IUPAC_name = 5-Fluoro-1- [4-hydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl] -1H-pyrimidine-2,4-dione

CAS_number = 50-91-9
ATC_prefix =
ATC_suffix =
ATC_supplemental =
PubChem = 5790
DrugBank = APRD00692
C=9 | H=11 | F=1 | N=2 | O=5
molecular_weight = 246.193 g/mol
bioavailability =
protein_bound =
metabolism =
elimination_half-life =
pregnancy_category =
legal_status =
routes_of_administration =

Floxuridine is an oncology drug that belongs to the class known as antimetabolites. The drug is most often used in the treatment of colorectal cancer.


Floxuridine, an analog of 5-fluorouracil, is a fluorinated pyrimidine.

Meachanism of action

Floxuridine works because it is broken down by the body into its active form, which is the same as a metabolite of 5-Fluorouracil.


Floxuridine first gained FDA approval in December 1970 under the brand name FUDR. The drug was initially marketed by Roche, which also did a lot of the initial work on 5-fluorouracil. The National Cancer Institute was an early developer of the drug. Roche sold its FUDR product line in 2001 to Faulding, which became Mayne Pharma.


In the US the drug is supplied by APP Pharmaceuticals, LLC; Hospira, Inc.; and Bedford Laboratories.

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