Mydayis (dextro- and amphetamine salts) seems to be more stressful on me than Vyvanse. The extended release mechanism also varies things. But hey, there’s a new goddamn shortage every week and we go with what works well enough.
As it was explained to me, you basically got three options: amphetamines, methylphenidates, and the “other stuff” (Wellbutrin, strattera, qelbree, guanfacine etc). This is a purely anecdotal analogy and oversimplification of how stuff works as it was told to me:
Amphetamines (adderall etc) hit the front door in the front of the brain — more dopamine, intense concentrated focus. Methylphenidates (Concerta etc) hit the back door in the front of the brain — more norepinephrine, longer-lasting, more alertness. The Other Stuff is back of brain, like if you turned down the ambient noise of a room.
Long and short of it is that one of these three approaches will tend to work well for an individual with ADHD, but the other two not so much. It’s pure trial and error, and it sucks, but with a decent provider and time (and insurance) you can eventually settle on one at a particular dose. Best of luck!