depression
"I used this on and off for several years, never over 150 mg/day. I liked the energy it provided, the suppression of appetite, the low cost (without insurance) and the increased sex drive (as opposed to Prozac/Zoloft which prevented me from reaching orgasm). 

The downside for me was increased sweating and anxiety. The anxiety was the worst. 

I now use Ritalin and prefer it."