Hello Codeforces

I was just wondering, Is there any kind of drugs to keep you focused during the round? a lot of times I get distracted and even I cant concentrate at all although I know the solution to the problem.

Any one tried any kind of this drugs? I read that "Nootropics" are helpful in this cases, but I didn't try it yet, and I know nothing about it's side effects, If you have any advice it would be really helpful.

P.S: I don't need something to get addicted to, just I want it to finish some of my programming projects in a tight schedule, and to improve my rating in some rounds.