Clinical data
ATC code none
CAS Number 64603-91-4 N
PubChem (CID) 3448
ChemSpider 3330 YesY
KEGG D04282 YesY
ECHA InfoCard 100.059.039
Chemical and physical data
Formula C6H8N2O2
Molar mass 140.14 g/mol
3D model (Jmol) Interactive image
 NYesY (what is this?)  (verify)

Gaboxadol, also known as 4,5,6,7-tetrahydroisoxazolo(5,4-c)pyridin-3-ol (THIP), is a conformationally constrained derivative of the alkaloid muscimol that was first synthesized in 1977 by the Danish chemist Povl Krogsgaard-Larsen.[1] In the early 1980s gaboxadol was the subject of a series of pilot studies that tested its efficacy as an analgesic and anxiolytic, as well as a treatment for tardive dyskinesia, Huntington's disease, Alzheimer's disease, and spasticity.[1] It was not until 1996 that researchers attempted to harness gaboxadol's frequently reported sedative "adverse effect" for the treatment of insomnia, resulting in a series of clinical trials sponsored by Lundbeck and Merck.[1][2] In March, 2007, Merck and Lundbeck cancelled work on the drug, citing safety concerns and the failure of an efficacy trial. It acts on the GABA system, but in a different way from benzodiazepines, Z-Drugs, and barbiturates. Lundbeck states that gaboxadol also increases deep sleep (stage 4). It is, however, not reinforcing like benzodiazepines are.[3]

In 2015, Lundbeck sold its rights to the molecule to Ovid Therapeutics, whose plan is to develop it for FXS and Angelman Syndrome.[4]

See also


  1. 1 2 3 Morris, Hamilton (August 2013). "Gaboxadol". Harper's Magazine. Retrieved 2014-11-20.
  2. US Patent 4278676 - Heterocyclic compounds
  3. Vashchinkina, E; Panhelainen, A; Vekovischeva, O. Y.; Aitta-Aho, T; Ebert, B; Ator, N. A.; Korpi, E. R. (2012). "GABA site agonist gaboxadol induces addiction-predicting persistent changes in ventral tegmental area dopamine neurons but is not rewarding in mice or baboons". Journal of Neuroscience. 32 (15): 5310–20. doi:10.1523/JNEUROSCI.4697-11.2012. PMID 22496576.
  4. Tirrell, Meg (16 April 2015). "Former Teva CEO's new gig at Ovid Therapeutics". CNBC. Retrieved 2015-05-06.
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