Dietmar: I can only speak from my own experience, since pd progresses at a different rate for everyone. I retired last month after working for 11 years with pd, but that is longer than most. After 10 years, 80 percent have retired. I was a high school English teacher and found I could no longer cope with the stress of the job and my diminishing capabilities. I could manage as long as my medicine was working, but it has become increasingly unreliable. Now if I eat anything at all, not just protein, I can usually plan on being "off" about an hour and a half later for about two and a half hours. When I was working I just didn't eat until the workday was over. Now that I'm retired, I'm looking to do things that will allow me a flexible schedule, like free-lance writing, paper grading, and homebound teaching. You might look into some work you can do on your computer at home. I'm as productive as I ever was - sometimes. Good luck to you. pine`