What is Fenethylline?
From the cited reference: “Fenethylline also known as amphetaminoethyltheophylline and amfetyline, is a codrug of amphetamine and theophylline, which behaves as a prodrug to both of the aforementioned drugs. It is marketed for use as a psychostimulant under the brand names Captagon, Biocapton, and Fitton. Since the cessation of its legal production in 1986, counterfeited products have been produced illicitly in south-east Europe and far-east Asia.”
Al-Imam A, Santacroce R, Roman-Urrestarazu A, Chilcott R, Bersani G, Martinotti G, Corazza O. Captagon: use and trade in the Middle East. Hum Psychopharmacol. 2017 May;32(3). doi: 10.1002/hup.2548. Epub 2016 Oct 21. PMID: 27766667.