Hello and thank you for your question. Parkinson's disease can sometimes present without a tremor. As long as he is tolerating the meds it makes sense to stay on them since they help with his symptoms which is also a good indication that this is PD. Ultimately, the best doctor to turn to is a movement disorder's specialist. This is a specially trained neurologist who specializes in Parkinson's disease and similar disorders.
I never see anything discussed anywhere about these particular symptoms, or research or trials being done regarding these symptoms. Do you know of any? Thank you.
is his voice soft or he has a hard time making words?
both and is better and worse at different times
hypophonia (or soft voice) is a very well documented symptoms of PD
Swallowing problems (dysphagia) can also occur
So this is not unique
sometimes PD patients are treated with deeb brain stimulation (DBS). however, I am not sure how well his particular symtpoms would respond
excuse me "deep"