ADHD isn't so much as you are all over the place, its more along the lines of erradic attention. Hyperfocusing on a problem (especially one that is interesting) and being super productive is a common symptom.
Stimulants basically help regulate the dopamine levels so you can context switch easier and spread your attention to more things.
Stimulants basically help regulate the dopamine levels so you can context switch easier and spread your attention to more things.