I was diagnosed with Parkinson's a few months ago. My symptoms are fairly moderate but I too have problems sleeping and drooling. I started taking Benadryl (diphenhydramine) just before going to bed. It is over the counter and has helped immensely with both the inability to sleep and the drooling. I happened upon this by chance when I took some Tylenol PM, hoping it would help me sleep. I learned diphenhydramine is the "pm" in Tylenol PM. I wasn't especially wild about taking Tylenol on a regular basis and learned that the active ingredient in Benadryl is diphenhydramine.
I am curious about what Dr. Okun thinks about taking this. I'm not a doctor and am not giving any medical advice. Just thought you might want to inquire about it. In any case I'd like to know if the Doc sees any problems taking Benadryl.