anxiety
"I had been struggling with OCD and anxiety and rage issues for a very long time.  I decided to get help after my daughter was born.  I was put on a myriad of different pills until Effexor.  It calmed me down, and my OCD is almost non-existent.  But miss a dose and you will be sick like you've never felt before!  Think of the worst flu you ever had...it's kinda like that but worse.  And all the anxiety comes back in full force.  It has really helped me to function,  but I would never have gotten on it if I knew how bad it was to get off it.  Try everything else before taking this.  It will help but at what cost?"