
Hi Bamy,
So you're already dx'd with Parkinson's and yet you think you may be exibiting symptoms indicative of MS. This is really something only you and your neuro can decide. I know some of the Parkinson's symptoms are similar to MS but then again, it's not unusual for people with neurological and immune diseases to have more than one. i.e. Lupus and MS.
I suggest the best thing to do is to contact your neuro and discuss the different Parkinson's meds with him and their side effects as Chris mentioned. He can then determine what the source of the symptoms may be in your case.