I started 2 days ago (1 capsule twice daily).
I asked the Nuero for Fampridine, which I'm guessing is not on the market yet but as I understand it is basically the same thing.
I did 4-AP once before but stopped after 2 weeks because I didn't notice anything. I don't think I gave it enough time, so I'm gonna do it for at least 6 months and see.
Good luck with yours!
If you can't explain it simply, you don't understand it well enough. - Al Einstein