I would recommend a second opinion as well. My wife was diagnosed with Parkinson’s disease about two years ago. It has progressed quite rapidly with the tremors being the least problematic symptom. She has experienced dementia along with multiple other issues. The question I have had is what the most accurate diagnosis might be.. It seems likely to be one of three: Parkinson’s with the dementia, Lewy body dementia, or multiple system atrophy. We are getting the second opinion from a new neurologist next week. I hope he will be able to shed some light on the likely progression going forward and we might manage it. No one can really know what it’s like to be either the patient or the caregiver without experiencing it. I can relate to everything in both the original post and all the replies. Best of luck to you and your husband.