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Name: Phenserine
Therapy Type: Small Molecule (timeline)
Target Type: Cholinergic System (timeline)
Condition(s): Alzheimer's Disease
U.S. FDA Status: Alzheimer's Disease (Inactive)
Company: Annovis Bio, TorreyPines Therapeutics, Inc.


Phenserine is a physostigmine analog that inhibits acetylcholinesterase. It has also been shown to inhibit Aβ production by reducing expression of APP (Klein, 2007; Venti et al., 2004; Utsuki et al., 2006).


Phenserine’s development was stopped after it failed to improve cognition or clinical measures in two Phase 3 trials (Sep 2005 news).

Last Updated: 11 Apr 2013


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News Citations

  1. Investigational Drug Phenserine Fails

Paper Citations

  1. . Phenserine. Expert Opin Investig Drugs. 2007 Jul;16(7):1087-97. PubMed.
  2. . The integrated role of desferrioxamine and phenserine targeted to an iron-responsive element in the APP-mRNA 5'-untranslated region. Ann N Y Acad Sci. 2004 Dec;1035:34-48. PubMed.
  3. . Identification of novel small molecule inhibitors of amyloid precursor protein synthesis as a route to lower Alzheimer's disease amyloid-beta peptide. J Pharmacol Exp Ther. 2006 Aug;318(2):855-62. PubMed.

Further Reading

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