ADHD medication.
I'm only on the first day of dosage testing, and my dose is still super-minimal, but I can feel my brain shifting gears. I was able to (mostly) focus in an hour and a half long meeting this morning; I did drift twice when a chance comment set my brain a-wandering into unrelated things for like 5-6 minutes, but I didn't have to dig my fingernails into the palm of my hand to stay focused!
And then I actually cleaned and organized my desk!
(Sadly, I can already feel it fading a bit, and I don't get to take another dose for two and a half hours...)
But just... holy shit! Is this what brains are supposed to be like?? Because even this little taste of partial baseline human functionality is amazing!