bipolar disorde
"I'm 37 and have depression, usually seasonal,  - sleeplessness, and occasional anxiety. 

I took 100 mg of Wellbutrin (and nothing else, it replaced zoloft at the time) for around 3-5 days. Within 2-3 days I was quite agitated, anxious and easily annoyed.  By day five I stopped taking because I felt hostile and again annoyed.  

Cannot speak for others, but this one really made me a monster and I have never, not once, felt like that from any of these:

zoloft
celexa
trazadone"