As I said in my original memo response, my personal experience is that caffeine really adds to the "jitters" of drug induced dyskenesia. I echo someone else's comment that it tended to drive my "bad" right leg crazy, when sitting it refused to be still- like Thumper the Rabbit. And when walking it made my right side gait even worse, adding to the cramping /pronation. End of dose was worst time.. I asked my neurologist about it , and he said while not all his PD patients had trouble w/ Caffeine, enough did , that eliminating it is an almost standa rd suggestion to those w/ dyskensia. I may be off on the exact #'s , but I once had a little wallet card from the office food service listing foods/ bev w/ caffeine . Fresh -brewed regular coffee was the worst @ 140mg. Regular Instant coffee was @75mg, just a little ahead of brewed tea. Cola drinks are next @ 40-60, chocolate in its many forms is @ the cola range , and lastly decaf coffee, tea, colas etc, which vary between 0 and a few mg. Of course Tea and coffee caffeine levels will vary with quantity and length of brewing/steeping. One last observation , if you can't give up all the "real hi -test" completely , I found the AM cup more of a problem, because of my high start of day medicine doses. So when I take a cup of real "joe", I try for after lunch. And although I often get those peripheral vision hallucinations, the "so-called little woodland animal syndrome", never once have I seen a Columbian farmer and his donkey loaded with the coffee crop. That surely would be the time to switch to decaf!! Take care. Stephen Holahan([log in to unmask])