Racetams

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Racetams are a class of compounds that share a pyrrolidone nucleus.[1] Many, including piracetam, are considered to be nootropics. Some such as oxiracetam and phenylpiracetam are also stimulants. Others such as levetiracetam and seletracetam are anticonvulsants.

Chemical structure of piracetam - the archetypal racetam.

Generally, racetams upregulate and preserve adequate levels of acetylcholine as a primary mechanism, suggesting they can aid recovery from deliriant intoxication and other typically cognitively impaired states.[2]

Examples

Analogues

Some drugs do not possess the pyrrolidone nucleus that defines a "racetam", but remains related to this family by virtue of structual similarity.

  • Omberacetam (Noopept) has a proline ring in place of the pyrrolidone ring. Its WHO-INN name ends with "racetam".
  • Unifiram and Sunifiram were identified by a series of modification on piracetam, starting by adding a second ring. Sunifiram shares no rings with piracetam and ended up closer in structure to ampakines.[3]

References

  1. Löscher, W., Richter, A. (17 March 2000). "Piracetam and levetiracetam, two pyrrolidone derivatives, exert antidystonic activity in a hamster model of paroxysmal dystonia". European Journal of Pharmacology. 391 (3): 251–254. doi:10.1016/s0014-2999(00)00105-9. ISSN 0014-2999. 
  2. Malykh, A. G., Sadaie, M. R. (12 February 2010). "Piracetam and piracetam-like drugs: from basic science to novel clinical applications to CNS disorders". Drugs. 70 (3): 287–312. doi:10.2165/11319230-000000000-00000. ISSN 1179-1950. 
  3. See https://www.tandfonline.com/doi/full/10.3109/14756366.2015.1021252, figure 1.