fenethylline

Fenethylline is a synthetic stimulant composed of amphetamine and theophylline chemically linked together. It was originally developed for medical use to treat conditions such as attention deficit disorders and narcolepsy, but it later became known as the active ingredient in Captagon, a drug with significant abuse potential. In the body, fenethylline is metabolized into amphetamine and theophylline, both of which contribute to its stimulating effects. It is now a controlled substance in most countries due to its high potential for abuse and addiction.