"i was on effexor which worked great until i went up to 150mgs and i got severe night sweats and dipped into a deep depression. my dr. switched me to viibryd, i was skeptical not ever hearing the name. i am almost finished with the starter pack as i am tapering off of effexor. everything is going great, my mood feels very stable and i don&#039;t have severe moments of hopelessness. however, since starting the 40mg dose, i have had severe insomnia and if i fall asleep i can&#039;t stay asleep for more than an hour or two. i&#039;ll be calling my doctor and hopefully going back down to 20mg. my only fear is that while i was taking 20mg of viibryd, i was still taking a low dose of effexor and now that i&#039;m not, i&#039;m afraid i won&#039;t have the same results on 20 mg."