alt Hacker News> I would take a small dose at like 7am, and I still would have trouble getting to sleep at night
Was this an extended release verson like Vyvanse? I had an absolutely terrible time with that for the same reasons. If that was your experience with plain dextroamphetamine, totally sounds like it's just not meant for you!
I tried the three big ones: regular Adderall, Adderall extended release, and Vyvance. None of them really helped my focus and all three really screwed with my sleep.
Kind of ironically, it turned out that a lot of my focus issues were due to (at the time) undiagnosed sleep apnea. The caffeine and the adderall sort of became band-aids that covered up the real problems.