I have been on Wellbutrin XL 300mg/day. I thought I was losing my mind. I too, broke out in hives, all over, felt flush. Then I would get pains in my arms and chest, so it would make me paranoid to the point I would feel like I was having a heart attack. I never realized it was the Wellbutrin because I am allergic to allot of things, so I would attribute it to other things. Has anyone else felt paranoid?