[idiotsecant]

That's wildly inaccurate. A brain is a complex system with emergent properties that result in us. The basic effect is an increase in Norepinephrine interactions but the effect that has on people with ADHD is obviously very different.

It's like saying that engines with fuel and engines with no fuel respond the same way to adding fuel: it increases the length of time they will run.

Stop adding fuel and the resulting system behaviour will be quite different.

[hirvi74]

> The basic effect is an increase in Norepinephrine interactions but the effect that has on people with ADHD is obviously very different.

I've heard it described as a difference in magnitude. If a person with ADHD has an arbitrary "focus" score of 5/10, and a normal person has a focus score of 8/10. If a stimulant brings them both up to a score of 9/10, then the effects may appear more noticeable in the ADHD person because a 4 point jump is typically far more apparent than a 1 point jump.