Venlafaxine
"While this medication calmed my stress, I wish I had never gone on it.  I have been trying to go off it for two years.  The withdrawal symptoms are horrendous. Brain zaps, anxiety ten times worse than before meds, isolation, low energy, extreme irritability, very quick to anger.  No joy.  I used to be a very happy and caring person. No more.  I would never wish this on anyone else..."