I've been struggling with sleep for a couple of years (actually a couple of decades, but it got worse a couple of years ago. after going down the medication hole (with no lasting help) I remembered that a couple of folks had mentioned here that reducing bedtime levodopa helped with sleep.
I cut back my 50.200 CR to 25/100 CR -- voila. MUCH better sleep. Now I have to taper the sleep meds!!!
One of my doctors told me at some point which I don't remember, that 50/200 , might help my sleep -- and I just kept taking it.
I hope this will be helpful to someone else with trouble sleeping...