I thought giving people adhd meds and seeing whether it relaxes them was a pretty good (not perfect) indicator? Am I wrong?
Over time you will develop more of a tolerance to these stimulating effects, at least to a degree, but the therapeutic benefits will continue for as long as you take them.
I don't take it in the morning for that reason. Because it has zero stimulation / awakeness effect on me, I wait to use it in the afternoon, when sleep inertia has fully dissipated.
EDIT: calm down wrt physical movement, symptoms on the cognitive side are still very present of course. It's just that adults tend to be better equipped to cope with some of them.