Fenethylline

Codrug of amphetamine and theophylline

Fenethylline or fenetylline (INN) is a codrug of amphetamine and theophylline and so a mutual prodrug of both. It is also spelled phenethylline; other names for it are amphetamin​oethyl​theophylline and amfetyline. The drug was marketed for use as a psychostimulant under the brand names Captagon, Biocapton, and Fitton. It is now illegal in most countries and is produced primarily for illicit use. Syria is considered to be the world's largest producer of the drug, accounting for about 80% of the global supply.

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