Question

Is dopamine low when you feel sleepiness?

Answer 1

Drugs that increase levels of dopamine in brain (including, but not limited to, drugs like cocaine, amphetamine, meth, and Ritalin) also increase feelings of wakefulness. ... Diseases that are characterized by low dopamine levels, like Parkinsons, also have daytime sleepiness.

Answer 2

Answer:

Diseases that are characterized by low dopamine levels, like Parkinsons, also have daytime sleepiness. But a neurotransmitter is only as good as its receptor. ... In the morning, they looked at the D2 receptors in the striatum of the brain, an area with loads of dopamine and associated with things like arousal and reward.