depression
"I've gone through a whole slew of antidepressants over the last years, and the only things that had helped at all were Wellbutrin (barely any improvement, but some) and Abilify (great improvement that completely disappeared after 2 months). Finally my doctor put me on methylphenidate, currently up to 60mg a day and while it's not a magic cure all it's been a fairly decent improvement and it's lasted for almost 4 months now."