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Systematic (IUPAC) name
Clinical data
  • (Prescription only)
PubChem CID 3326
ChemSpider 3209
Chemical data
Formula C24H31N3O
377.52 g/mol

Famprofazone (Gewodin, Gewolen) is a non-steroidal anti-inflammatory agent (NSAID) of the pyrazolone series which is available over-the-counter in some countries such as Taiwan.[1][2][3] It has analgesic, anti-inflammatory, and antipyretic effects.[1][2] Famprofazone has been known to produce methamphetamine as an active metabolite, with 15-20% of an oral dose being converted to it.[4][5] As a result, famprofazone has occasionally been implicated in causing false positives on drug tests for amphetamines.[3]

See also[edit]


  1. ^ a b Swiss Pharmaceutical Society (2000). Index Nominum 2000: International Drug Directory (Book with CD-ROM). Boca Raton: Medpharm Scientific Publishers. p. 1932. ISBN 3-88763-075-0. 
  2. ^ a b Hall, Judith A.; Morton, Ian (1999). Concise dictionary of pharmacological agents: properties and synonyms. Kluwer Academic. p. 342. ISBN 0-7514-0499-3. 
  3. ^ a b Chan KH, Hsu MC, Tseng CY, Chu WL (2010). "Famprofazone use can be misinterpreted as methamphetamine abuse". Journal of Analytical Toxicology 34 (6): 347–53. doi:10.1093/jat/34.6.347. PMID 20663288. 
  4. ^ Oh ES, Hong SK, Kang GI (March 1992). "Plasma and urinary concentrations of methamphetamine after oral administration of famprofazone to man". Xenobiotica 22 (3): 377–84. doi:10.3109/00498259209046649. PMID 1496827. 
  5. ^ Shin HS, Park BB, Choi SN, Oh JJ, Hong CP, Ryu H (1998). "Identification of new urinary metabolites of famprofazone in humans". Journal of Analytical Toxicology 22 (1): 55–60. doi:10.1093/jat/22.1.55. PMID 9491970.