|Chemical and physical data|
|Molar mass||354.469 g·mol−1|
|3D model (JSmol)|
NFEPP (N-(3-fluoro-1-phenethylpiperidin-4-yl)-N-phenylpropionamide) is an analgesic opioid chemical, similar in structure to fentanyl, designed in 2016 by Spahn et al. from Free University of Berlin to avoid the standard negative side effects of opiates, including opioid overdose, by only targeting inflamed tissue.
Throughout 2017 there were many papers published regarding this substance, but by 2019 it had dwindled to just a few, and none in 2020. It appears interest in this candidate has waned considerably
Inflamed tissue has a lower pH value (~5–7) than non-inflamed tissue (7.4). Through computer simulation, scientists found a way to make the fentanyl analog only affect inflamed tissue via the addition of fluorine to the chemical structure. In experiment, it was shown that NFEPP produced injury-restricted analgesia in rats with different types of inflammatory pain without exhibiting typical opiate effects, including respiratory depression, sedation, constipation, and chemical seeking behavior.
As a result, NFEPP has the potential to reduce opioid addiction and dependency, as there is no effect on users who are not actually suffering from pain, as the chemical does not interact with non-inflamed brain tissue.
- Drug Enforcement Administration, Department of Justice (February 2018). "Schedules of Controlled Substances:Temporary Placement of Fentanyl-Related Substances in Schedule I. Temporary amendment; temporary scheduling order". Federal Register. 83 (25): 5188–92. PMID 29932611.
- Spahn V, Del Vecchio G, Labuz D, Rodriguez-Gaztelumendi A, Massaly N, Temp J, et al. (March 2017). "A nontoxic pain killer designed by modeling of pathological receptor conformations". Science. 355 (6328): 966–969. Bibcode:2017Sci...355..966S. doi:10.1126/science.aai8636. PMID 28254944. S2CID 206653322.
- Halford B (2017). "An opioid minus major side effects". Chemical & Engineering News. 95 (10): 8.
- Mole B (4 March 2017). "Early study suggests new opioid is non-addictive, works only where it hurt". Ars Technica.