When I was using, the answer was always "more." It was great at first, but as I habituated to each dose level, I was prescribed more and more until I reached the legal limit.

At which point, I habituated again, got none of the benefits from using it, but if I tried to stop taking it, I went into the same kind of withdrawal a meth addict does: dopamine crash. Nothing in life gave me any pleasure. Took years to come back to normal.

Erm

One 20mg tablet daily. Life-changing for those of us who actually need it.

edit to add: Ritalin, not Adderall, but similar enough.

none/never

When preparing my morning shake, I open the pill bottle and add `er all, like the name says.