How the brain reacts to excessive dopamine levels when exposed to addictive drugs?

Excessive Dompamine levels is associated with enhanced aggression, increased impulsivity. Excessive Dopamine is also associated with patients with Schizophrenia psychosis. Dopamine is associated with pleasure addiction, influences movement, hightened attention, emotion. As a drug addict continues to abuse drugs, the brain adapts to the overwhelming surges in dopamine by producing less of of its own dopamine

Because without physical activity, the body has extra "energy" if you will, and so when it is time for bed you are not tired, so you end up staying up all night. also there is probably an effect on your internal clock, which messes with your melatonin production which goes hand in hand with your sleep cycle