Clinical data
Routes of
ATC code M01AE10 (WHO)
Legal status
Legal status
  • Withdrawn
Pharmacokinetic data
Bioavailability High (rapid and complete absorption)
Metabolism Glucuronidation
Biological half-life 2.3 hours
Excretion Renal
CAS Number 31842-01-0 YesY
PubChem (CID) 3718
DrugBank DB08951 N
ChemSpider 3587 YesY
KEGG D04530 YesY
ECHA InfoCard 100.046.197
Chemical and physical data
Formula C17H15NO3
Molar mass 281.306 g/mol
3D model (Jmol) Interactive image
 NYesY (what is this?)  (verify)

Indoprofen is a non-steroidal anti-inflammatory drug. It was withdrawn worldwide in the 1980s after postmarketing reports of severe gastrointestinal bleeding.[1]

A 2004 study using high-throughput screening found indoprofen to increase production of the survival of motor neuron protein, suggesting it may provide insight into treatments for spinal muscular atrophies.[1][2]


The isoindolone ring system forms the nucleus for one of the more traditional "profen" NSAIDs.

Indoprofen synthesis:[3] Patents:[4][5]

Reduction of the nitro group in arylpropionic acid (1) gives the corresponding aniline (2). Reaction of the intermediate with the imide (3) from phthalic anhydride (ie. phthalimide) gives the product (4) in which the aniline nitrogen has exchanged with ammonia (apparently phthalic anhydride was not used directly). Treatment of the new imide with zinc in acetic acid leads, interestingly to reduction of but one of the carbonyl groups to afford indolone, indoprofen.


  1. 1 2 Frazin, Natalie (March 9, 2005). "Pain Reliever May Provide Clues for Treating Spinal Muscular Atrophy". United States National Institute of Neurological Disorders and Stroke. Retrieved 2007-10-06.
  2. Lunn MR, Root DE, Martino AM, et al. (2004). "Indoprofen upregulates the survival motor neuron protein through a cyclooxygenase-independent mechanism". Chem Biol. 11 (11): 1489–1493. doi:10.1016/j.chembiol.2004.08.024. PMC 3160629Freely accessible. PMID 15555999.
  3. Nannini, G; Giraldi, P. N.; Molgora, G; Biasoli, G; Spinelli, F; Logemann, W; Dradi, E; Zanni, G; Buttinoni, A; Tommasini, R (1973). "New analgesic-anti-inflammatory drugs. 1-Oxo-2-substituted isoindoline derivatives". Arzneimittel-Forschung. 23 (8): 1090–100. PMID 4801034.
  4. BE 753600; R. W. J. Carney, G. de Stevens, U.S. Patent 4,316,850 (1970, 1982 both to Ciba).
  5. P. N. Giraldi et al., DE 2154525 (1972 to Carlo Erba), C.A. 77, 88292v (1972).

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