Are you on any other meds? I know Metformin can cause this, if not taken with food.
No, not Diarrhea. But recently insomnia and anxiety. That's one thing I hate about Parkinson's is you never know when you will get more systems and if caused by Parkinson's or meds. I take Carbidopa/levedova every 3 hrs. I sure hope you can get your Darrhea under control.