Introduction
In adults 100 to 800 milligrams per day has been used in a couple studies showing effects in the brain. One of the things that's going wrong in ADHD is that the brain is not getting dopamine's signal that something is valuable enough to keep paying attention to it.
I think the drugs that are used to treat ADHD are increasing the tonic level of dopamine in the frontal cortex, and they're increasing the tonic level of dopamine in the basal ganglia. In the frontal cortex, the increased dopamine is basically making more stable mental states. If you focus on something, you will hold on to that better. In the basal ganglia, increasing the tonic dopamine is making it harder for a new thing to grab your attention, which reinforces the fact that you are more focused. Anything that increases dopamine is going to be good.
This Q&A can also be found as part of a much longer episode, here:
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