I think the question above was about side effects, is there a reason to believe they are any different with and without ADHD? Even regarding the main effect, m

I think the question above was about side effects, is there a reason to believe they are any different with and without ADHD? Even regarding the main effect, my understanding is that it's "concentration boost" in both cases, just seen more socially acceptable for people who lack concentration in the first place. Is there any study that would demonstrate the difference?