"on and off depression and severe anxiety for 40 years.  tried many medications, most with very uncomfortable side-effects.  changed to celexa over 8 years ago with remarkable results and absolutely no discernible side-effects.  doctor had changed medicine to something new about 3 years ago and my wife made me go back to celexa after only a few months.  under extreme stress anxiety does return, but not nearly as severe.   i am now 62 years old."