"i had been on prystiq for about 8 months, but i thought my mood swings, irritability, paranoid thoughts, anxiousness, etc, were a thing of the past.  also, prystiq is an expensive drug that is not covered by my pharmacy coverage.  so, i quit cold turkey.  brain zaps, zombie mode, feeling horrible were all part of what i endured, but the symptoms quickly subsided.  what came back a month after stopping prystiq was the little dark cloud and all over the other things that i thought were in my past.  i was having difficult coping. 
 now, i am on day two of effexor (which costs pennies on the dollar as compared to prystiq).  the nausea is intense but i know that if i stick with it the results will be all for the best."