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| AHFS/Drugs.com | International Drug Names |
| Routes of administration | By mouth[1] |
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| Metabolism | partly converted to amphetamine (30 to 60%)[1] |
| Excretion | urine, mainly asamphetamine, about 5 to 9% unchanged[1] |
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| ECHA InfoCard | 100.036.752 |
| Chemical and physical data | |
| Formula | C12H16N2 |
| Molar mass | 188.274 g·mol−1 |
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Fenproporex (Perphoxene) (N-2-Cyanoethylamphetamine) (3-(1-phenylpropan-2-ylamino)propanenitrile) (3-[(1-Methyl-2-Phenylethyl)amino]propiononitrile) is astimulantdrug of thephenethylamine andamphetaminechemical classes that was developed in the 1960s. It is used as anappetite suppressant for the treatment ofobesity.[3]
Fenproporex producesamphetamine as ametabolite[4][5] and was withdrawn in many countries following problems withabuse,[6] but it is still prescribed in some countries. It is sometimes combined withbenzodiazepines,antidepressants, and other compounds to create a version of the "rainbow diet pill".[7][8][9]
Fenproporex has never been approved by theUS Food and Drug Administration (FDA) for sale in the US due to lack of efficacy and safety data. However, in March 2009, the FDA warned consumers that it has been detected as an unlabeled component of diet pills available over the Internet.[10] Fenproporex is designated a Schedule IVcontrolled substance in the US pursuant to theControlled Substances Act.[11]
Fenproporex is on the list ofsubstances banned by theWorld Anti-Doping Agency, and any sportsperson testing positive for the substance faces a ban from competition.[12]