depression
"I was started on 75mg at first and for 2 weeks I had the worst side effects.  I literally thought I was going insane. The doctor told me it was normal and ride it out another week.  So I did and it passed.  They moved me to 150mg XL and it worked wonderful for years.  A few years in I had to go up to 300 XL but I was still panic free and depression free.  Until recently when it stopped working and I had Prozac added to the mix.  I would recommend welbutrin XL to people.  Just know you can push through those awful side effects for a few weeks to feel better."