Thank you very much for posting the query in HCM
Please note that there are two types of Parkinson’s disease
1. Typical Parkinson's disease- this type generally responds to medicine. However, as the disease advances, the response to medicine may come down and patients may develop side effects related to medicines. I am sorry that i don’t know the exact medicine your father is taking as of now. The best medicine will be Levodopa carbidopa combination, in a reasonably good dose depending upon his response and tolerance. There are other options in this parkinson's diases apart from medicine that is known as deep brain stimulation
. He has to have regular exercises, physiotherapy
2. Atypical parkinson’s disease: Here the patients symptomatology will be more than the typical one. They may have memory problem, behavioral problem, and frank hallucination
to start with. This can be recognized by a neurologist
. Generally speaking these subgroups don’t benefit much with treatment. There are so many types of these sub-types. Treatment depends upon the exact sub-type.
So my advice will be to get evaluated by a local neurologist and then approach a medical unioversity nearby who will guide you regarding the various options as i discussed.
Hope this helps