Keith "Semphis" Freisen, a professional Counter-Strike: Global Offensive player, admitted in an interview that he, alongside others, was under the effects of Adderall during a recent tournament. The drug is usually prescribed to treat ADHD, but it can also increase a person's focus. Students have used it to study, and eSports players have used it to improve their in-game performance. While there are no rules strictly banning Adderall from CS:GO tournaments, ESL's restricts drug use and can punish players with exclusion for playing under the influence.

"I don’t even care. We were all on Adderall. I don’t even give a fuck. It was pretty obvious if you listened to the comms. People can hate it or whatever." — Keith "Semphis" Freisen, Professional Counter-Strike: Global Offensive Player

It's certainly unnerving that the subject is talked about so openly by a player. The eSports industry is worth millions of dollars, with tournaments handing out massive cash prizes to winning teams. However, if the sport continues to expand, it will soon be in need of stricter regulations.

Source: Launders