depression
"I was taking welbutrin xl for depression.  I found that it's effect lessened after time. After hearing about Niacin, I decided to give it a try. 3 years later, I still take it daily.   1000 mg of no flush Niacin has helped keep my depression in check. No symptoms at all.
I highly recommend anyone with depression to at least try it. I also found that Niacin starts working much faster than traditional medication."