depression
"I've been on Effexor XR for several years now.  As far as helping to control my depression, it has been wonderful.  However, I have had some severe side effects.  I have gained 80 lbs since I started taking the medication.  I have been diagnosed with benign vertigo.  I have had countless specialists poke and prod me because no one can figure out why I get a sinus infection every month.  I stopped getting menstrual cycles, and specialists can't figure out why.  These are all possible side effects"