https://www.washingtonpost.com/news/...uman-soldiers/
A powerful amphetamine tablet based on the original synthetic drug known as "fenethylline," Captagon quickly produces a euphoric intensity in users, allowing Syria's fighters to stay up for days, killing with a numb, reckless abandon.
"You can't sleep or even close your eyes, forget about it," said a Lebanese user, one of three who appeared on camera without their names for a BBC Arabic documentary that aired in September. "And whatever you take to stop it, nothing can stop it."