Stimulant medications for ADHD operate primarily by increasing levels of dopamine and norepinephrine, which enhances signal-to-noise ratios in brain networks.

“what we have in the context of a drug like Adderall or vivance or to some extent methylphenidate Ritalin does this as well is an increase in dopamine and neuro epinephrine that is leading to two things both a reduction in noise a quieting of the circuitry that we don't want to hear so much from and ”