"i had taken prozac for approximately 20 years when i noticed my depression was coming back and i felt it was no longer working for me.  i then started on the path of trying everything on the market; none of them seemed to work and that has been over the last 6 years.  now i&#039;m thinking about asking my doctor to switch me back to prozac and see perhaps if it was helpful just being off it for while, give my system a break and maybe it will work again for me.  "