abbreviation for dexedrine: a drug used in the treatment of ADHD that is sometimes taken illegally for pleasure

I did some dex and didn't sleep all night. 我吃了些迪西卷，整夜无法入睡。

I knew nothing of “speed”, “dex”, “ketamine”, or “amphetamine”. 我对“快速丸”、“迪西卷”、“克他命”或“安非他命”等一无所知。