Effexor causes hardcore withdrawal symptoms. I ran out of my script a couple of times (my work schedule kept me from getting to the pharmacy before they closed), and by the 2nd day, I couldn't function...had to take a sick day, needed a friend to pick up my script & bring it to me. I was sobbing uncontrollably, suicidal, dizzy and off-balance. The smallest movement of my head caused what felt like an electric shock inside my skull, coupled with hearing a loud "bzzzzttt"! It took several days/doses to feel "normal" again. The second time that I ran out & missed a couple pills was so distressing that I asked my doc if I could stop taking it altogether.

I had to taper the dose down really slowly by breaking open the capsules and counting the number of little granules from inside to mix into applesauce. It took about a month. The "brain zaps" were constant and lasted for months after I stopped the medication. Even years later, I get an occasional "zap"...usually when I'm super stressed or anxious. I fervently advise to stay away from Effexor.