There is a video going around on Facebook that shows a highly agitated man with PD gaining instant relief seconds after taking pure cannabis. It does look a bit stage managed but equally does make you wonder.
I have no visible tremor but do feel constantly uncomfortable in my left shoulder and elbow. I can rarely relax and am constantly shifting from sitting to standing. I have to admit that a few alcoholic drinks in the evening eases this by helping my muscles to relax. I wonder if cannabis would be a good alternative.