Flunixin

Source: Wikipedia, the free encyclopedia.
Flunixin
Clinical data
AHFS/Drugs.comInternational Drug Names
ATCvet code
Identifiers
  • 2-[[2-Methyl-3-(trifluoromethyl)phenyl]amino]pyridine-3-carboxylic acid
JSmol)
  • CC1=C(C=CC=C1NC2=C(C=CC=N2)C(=O)O)C(F)(F)F
  • InChI=1S/C14H11F3N2O2/c1-8-10(14(15,16)17)5-2-6-11(8)19-12-9(13(20)21)4-3-7-18-12/h2-7H,1H3,(H,18,19)(H,20,21) ☒N
  • Key:NOOCSNJCXJYGPE-UHFFFAOYSA-N ☒N
 ☒NcheckY (what is this?)  (verify)

Flunixin is a

U.S. Food and Drug Administration
(FDA), and may only be lawfully distributed by order of a licensed veterinarian. There are many trade names for the product.

Dosage and uses in horses

Flunixin is administered at a dose of 1.1 mg/kg.

plasma half life of 1.6–2.5 hours, effects can persist for up to 30 hours,[2] with maximal effects occurring between 2 and 16 hours. This is likely due to accumulation of the drug at inflammatory foci. Flunixin is primarily eliminated by the kidneys.[3]

Because it targets the inflamed tissue, flunixin is mainly used for

endotoxemia.[7]

Side effects and precautions

Flunixin is labeled for no more than 5 days of consecutive use and prolonged use increases the risk of toxicity. In horses, this includes gastric ulcers,[8] right dorsal colitis,[9] and nephrotoxicity.[10]

Flunixin is a prohibited substance under International Federation for Equestrian Sports rules,[11] and its use is prohibited or restricted by many other equestrian organizations. At labeled dose (1.1 mg/kg) given IV, detection time was found to be 144 hours.[12] However, drug recycling from bedding contamination by treated horses has been shown to potentially increase the clearance time.[13]

Administration

Flunixin may be given orally as a paste or as granules in feed. It can also be used intramuscularly (IM) or intravenously (IV). However, it is very irritating to tissue and IM administration has been associated with myonecrosis in horses,[14] so IV administration is preferred.

Administration of phenylbutazone to a horse also receiving flunixin has been shown to increase the risk of toxicity without improving analgesia.[15][16] For this reason, concurrent administration with another NSAID is not recommended. Doubling the dose of flunixin produces no improvement in analgesia, while potentially increasing the risk of toxicity.[4]

In the US, the only labeled route for flunixin administration in cattle is intravenous and pour-on. This is not the case in other countries; for example, in the UK, Allevenix is licensed for IV and intramuscular use,[17] and a pour-on product also exists.[18]

In the US flunixin is not labelled for goat use, however, flunixin may be used in goats in an extra-label fashion under appropriate veterinary guidance. Flunixin administered subcutaneously to dairy goats may carry a milk withdraw recommendation of 36-60 hours.[19] Interestingly, when given subcutaneously to goats in that study, tissue injury, such as seen in horses with intramuscular administration, was not observed.

See also

References

  1. ^ McIlwraith CW, Frisbie DD, Kawcak CE (2001). "Nonsteroidal Anti-Inflammatory Drugs". Proc. AAEP. 47: 182–187.
  2. ^ May SA, Lees P (1996). "Nonsteroidal anti-inflammatory drugs". In McIlwraith CW, Trotter GW (eds.). Joint Disease in the Horse. Philadelphia: WB Saunders. pp. 223–237.
  3. PMID 3247913
    .
  4. ^
    PMID 23447872
    .
  5. PMID 9118091
    .
  6. PMID 21781166
    .
  7. PMID 12602591
    .
  8. PMID 19580940
    .
  9. PMID 18980433
    .
  10. S2CID 28865193
    .
  11. ^ "FEI Prohibited Substances List". 28 October 2013. Retrieved 23 January 2016.
  12. ^ "FEI List of Detection Times" (PDF). Retrieved 23 January 2016.
  13. PMID 21995754
    .
  14. PMID 12553469
    .
  15. PMID 22082440
    .
  16. PMID 16506899
    .
  17. ^ "Allevinix 50 mg/ml solution for injection for cattle, pigs and horses". NOAH Compendium. National Office of National Health. Retrieved 19 April 2017.
  18. ^ "Finadyne Transdermal 50 mg/ml pour-on solution for cattle". NOAH Compendium. National Office of National Health. Retrieved 19 April 2017.
  19. PMID 32509803
    .

External links
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