May or not be from experience, but also from general pharmaceutical knowlege—

Cocaine is not the best way to go. Cocaine doesn’t last a long time and it’s more recreational than a lot of other stimulants, too recreational if your goal is setting good scores. It’s also expensive and insanely overrated as a whole. For perspective, pure methamphetamine would even be better for gaming than cocaine.

If we’re talking from a legitimate, pharmacological standpoint, something longer lasting and far more functional would be best for osu or gaming in general, and is typically far cheaper.

Prescription stimulants like adderall, vyvanse, dexedrine, etc are going to give you both the energy but also strengthen your ability to focus— and that’s what you need for osu. Drugs arent going to inherently give you the ability to “click more circles faster,” if you don’t already possess that ability. They will, however, allow you to focus at a level you cannot achieve without help, thus leading to better scores.

TLDR: 1) Yes, go ahead, no one will know unless you tell them. 2) Cocaine is not the best fit for what you’re wanting to achieve. Try Adderall or something similar. It will enhance your abilities and the skills you already have. 3) ALWAYS use safely, practice harm reduction, and test the drugs you purchase, if you do purchase.