I'm on day 3 of Viibryd. Doc doesn't know too much about it--I am the "guinea pig" and so far so good. I have been really tired at times, yet can't get to sleep too easily, yet. Got dizzy standing up once yesterday. But I checked out forums on chipur.com and depressionforums.org. Lots of user experiences and side effect info there! Tried many meds through the years, maybe this one will help, with acceptable side effects.