Any strong focus supplements or Adderall alternatives in Paris?

Hey everyone, I recently moved to Paris and have been struggling with focus. Back home, I used to take something for ADHD, but getting diagnosed here is insanely expensive without insurance, so I don’t really have access to anything. I have a big project due and really need something to help me concentrate.

I know Adderall isn’t a thing in France, but do people use any strong alternatives? Open to suggestions, whether it’s supplements, nootropics, or anything that actually works. Let me know if you have any advice!