I am experiencing severe hair loss - I was on Wellbutrin XL for a...

I am experiencing severe hair loss - I was on Wellbutrin XL for a year and a half with no side effects, then changed doctors and we prescribed the generic, bupropion. That is when my marked hair loss began. I then switched to Lexapro, but felt like a zombie, and so went back to the bupropion hoping that it was a vitamin deficiency that was causing my hair loss and not the med. But, with all sorts of supplements, my hair continues to thin - I used to have thick, healthy shiny hair, and now cannot bear to touch my head because it is so upsetting to have lost so much hair. Has anyone else experienced NOT losing hair on the brand name Wellbutrin, then switching to the generic and losing hair? I don't want to give up the med because it has worked so well for my depression, but I don't want to loose my hair either. HELP!! Thanks!