I have vertigo quite often. I find that Physical Therapy helps.

Hello Jean. No one can diagnose your husband’s dizziness except his Neurologist. Each of us with Parkinson’s are different and have symptoms others may not have. It would be wise to call and get in to see his Neurologist or Movement Disorder Specialist to determine the cause of his dizziness. He may need an adjustment on his PD meds, if not the doctor can find the answer. Otherwise, our guesses on this site as to what is causing it can do nothing but cause you more worry. You and he are both wise for realizing he should no longer drive. I don’t like it but I can’t drive anymore either. Be at peace and find your answer from his doctor.
Praying for you
Carol

It could be Benign Paroxysmal Positional Vertigo (BPPV), which is very easily treated. Otherwise it could be related to his blood pressure or blood sugar. It could be a reaction to medications. He needs to see a doctor.

I have been diagnosed with frequent problems os Vertigo. Physical therapy helps and there is a medication you can use.

I am on one half of 0.1 mg of fludrocortisone every morning due to my blood pressure dropping.