depression
"My son suffered 3 concussions back to back which left him in a zombie like state for several (7) years. He was not sad, per se, just in a state of chronic malaise coupled with chronic fatigue, i.e. not being able to stay awake more then 2 or 3 hours at a time. Finally, we were able to find a Doctor who was familiar with head injuries and the low level of dopamine that the victim is often left with. Wellbutrin is a dopamine and noradrenaline re-uptake inhibitor so it is really working great for our son. It was literally like flicking his switch back "on".  Anyone who has not felt like their old self after even a minor concussion should consider using this medicine."