I drink a large Iced cappuccino every morning which I make myself. And then, maybe an Iced Latte during a walk in town with my wife. I never was a big coffee drinker and it never kept me from sleeping. But, I don't drink more than 2 cups a day. It's hard, if not impossible, to know if it's affecting my PD. My Sinemet definitely helps me control my tremors. My bigger problem is, I need my wife to tell me if the coffee is good since I can't taste or smell as a result of the PD. To me it just tastes like water. Oh well, how about another round, Make mine espresso please.