If a person takes dopamine increasing medication for some illness, what effect will it have on his/her mental health considering that medication doesn't target just one area of the brain ?
In Parkinson's disease, dopamine is lacking in the brain area responsible for motor functions i.e. muscle movement hence creating spasms in muscles. Dopamine medication corrects this but it doesn't target just that area of the brain.
I'm curious what happens with all the dopamine roaming in other parts of the brain, and how it affects mental health?
EDIT: I've made some changes, I hope it's more understandable now.