Hello @mjfelder1 and welcome to Mayo Connect's discussion on Parkinson's Disease (PD). A diagnosis of PD can be difficult to accept and especially problematic when the typical symptoms of PD are not evident. I can understand your concern that the meds that have been prescribed have not helped him.
If you are comfortable sharing more, can you explain what symptoms led the doctor to diagnose your husband with PD? For example, was he having numbness, tingling, problems walking or using his hands, were his symptoms one-sided?
When your husband was diagnosed was he seeing a movement disorder specialist? This is a neurologist who has had special training in diagnosing and treating disorders like PD.