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Systematic (IUPAC) name
Clinical data
AHFS/Drugs.com International Drug Names
Legal status
  • veterinary prescription only
Routes intramuscular, subcutaneous
CAS number 73231-34-2 N
ATCvet code QJ01BA90 QJ51BA90
PubChem CID 114811
ChemSpider 102776 YesY
UNII 9J97307Y1H YesY
KEGG D04194 YesY
Synonyms 2,2-dichloro-N-((1R,2S)-3-fluoro-1-hydroxy-1-(4-(methylsulfonyl)phenyl)propan-2-yl)ethanamide
Chemical data
Formula C12H14Cl2FNO4S 
Mol. mass 358.21 g/mol
 N (what is this?)  (verify)

Florfenicol (marketed by Schering-Plough Animal Health under the trade name Nuflor) is a fluorinated synthetic analog of thiamphenicol.[1]

In the United States, florfenicol is currently indicated for the treatment of bovine respiratory disease (BRD) associated with Mannheimia (Pasteurella) haemolytica, Pasteurella multocida, and Haemophilus somnus, for treatment of bovine interdigital phlegmon (foot rot, acute interdigital necrobacillosis, infectious pododermatitis) associated with Fusobacterium necrophorum and Bacteroides melaninogenicus.

The use of florfenicol in horses, and likely in other equids, typically causes diarrhea. This has been anecdotally reported to progress to lethal cases of acute colitis. Therefore, use of this antimicrobial in the equine patient should be limited to cases in which other, safer, options are not available. [2]


Florfenicol was among the drug contaminants in a brand of supermarket eggs in Taiwan and Iran.[3]

External links[edit]


  1. ^ Syriopoulou VP, Harding AL, Goldmann DA, Smith AL (February 1981). "In vitro antibacterial activity of fluorinated analogs of chloramphenicol and thiamphenicol.". Antimicrob Agents Chemother. 19 (2): 294–7. PMC 181412. PMID 6957162. 
  2. ^ Robinson, N.E.; Sprayberry, K.A. (2009). Current therapy in equine medicine. Saunders Elesevier. p. 13. ISBN 978-1-4160-5475-7. Retrieved March 21, 2011. 
  3. ^ http://www.taipeitimes.com/News/taiwan/archives/2013/01/08/2003552041