depression
"I'd switched to Viibryd from Effexor XR October 21,2013. Transition was fine, 10 mg dose for a week  I felt great..better than in years..up to 20, amazing..few side effects, soft multiple stools..not much more. Was going to stay at 20mg until I started having random anxiety attacks throughout the day. So took it to 40mg..what a nightmare! I turned bipolar, paranoid, and more anxiety. Back down to 20mg, was better for a bit, but now I have diarrhea daily and having 3am panic attacks. Seeing doctor this week, getting off Viibryd..sigh. I really wanted this one to work."