This link was sent to me to share. It has some good links to research about CBD and Parkinson's. There may be some improvements in well-being, quality of life, psychotic symptoms associated with PD. However:
"The Michael J. Fox Foundation for Parkinson’s Research adds that research in this area is somewhat limited due to governmental regulations, with interpretation of results also impacted due to no standardization of CBD doses or use of products containing CBD and THC combined.[12] Therefore, it can be difficult to determine the specific effect CBD can provide to Parkinson’s patients."