Re: ADHD education of critical importance
I haven't researched this particular question, but another possibility, working from my limited understanding is that:
a) Dopamine and norepinephrine are chemically very similar, dopamine being a precursor of norepi, thus perhaps they share receptors in some cases? If this is the case, what blocks receptors for one might block receptors for the other?
b) As dopamine is the direct precursor of norepi, increasing the ready supply of norepi would then decrease the demand, which would lead to less dopamine being converted to norepi, thus increasing the available supply of dopamine?
No idea if these are plausible, just ideas that came to mind when reading your post.