Hello,
Here is the link to our PD forum-
https://www.neurotalk.org/parkinson-s-disease/

It might help to know his age & how long he has had PD & taken the meds involved, but only if you want to mention it.

My dad had PD for 20+ yrs and as he aged (80s+) we had to reduce & eventually stop all but the C/L meds due to side effects showing up..
like on & off dementia, anxiety, delusions..


You can also use our search tool to find specific meds, symptoms and other topics.. select Parkinson's Disease to search in..
https://www.neurotalk.org/search.php