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Niflumic acid

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Niflumic acid
Clinical data
AHFS/Drugs.comInternational Drug Names
ATC code
Pharmacokinetic data
Elimination half-life2.5 hr[1]
  • 2-{[3-(trifluoromethyl)phenyl]amino}nicotinic acid
CAS Number
PubChem CID
CompTox Dashboard (EPA)
ECHA InfoCard100.022.289 Edit this at Wikidata
Chemical and physical data
Molar mass282.222 g·mol−1
3D model (JSmol)
Melting point204 °C (399 °F)
  • C1=CC(=CC(=C1)NC2=C(C=CC=N2)C(=O)O)C(F)(F)F
  • InChI=1S/C13H9F3N2O2/c14-13(15,16)8-3-1-4-9(7-8)18-11-10(12(19)20)5-2-6-17-11/h1-7H,(H,17,18)(H,19,20) ☒N
 ☒NcheckY (what is this?)  (verify)

Niflumic acid is a drug used for joint and muscular pain. It is categorized as an inhibitor of cyclooxygenase-2. In experimental biology, it has been employed to inhibit chloride channels.[2] It has also been reported to act on GABA-A[3] and NMDA channels[4] and to block T-type calcium channels.[5]


  1. ^ "Half life". Drug Bank. Retrieved 15 July 2011.
  2. ^ Knauf PA, Mann NA (May 1984). "Use of niflumic acid to determine the nature of the asymmetry of the human erythrocyte anion exchange system". The Journal of General Physiology. 83 (5): 703–25. doi:10.1085/jgp.83.5.703. PMC 2215658. PMID 6736917.
  3. ^ Sinkkonen ST, Mansikkamäki S, Möykkynen T, Lüddens H, Uusi-Oukari M, Korpi ER (September 2003). "Receptor subtype-dependent positive and negative modulation of GABA(A) receptor function by niflumic acid, a nonsteroidal anti-inflammatory drug". Molecular Pharmacology. 64 (3): 753–63. doi:10.1124/mol.64.3.753. PMID 12920213.
  4. ^ Lerma J, Martín del Río R (February 1992). "Chloride transport blockers prevent N-methyl-D-aspartate receptor-channel complex activation". Molecular Pharmacology. 41 (2): 217–22. PMID 1371581.
  5. ^ Balderas E, Ateaga-Tlecuitl R, Rivera M, Gomora JC, Darszon A (June 2012). "Niflumic acid blocks native and recombinant T-type channels". Journal of Cellular Physiology. 227 (6): 2542–55. doi:10.1002/jcp.22992. PMC 4146346. PMID 21898399.