Ron, As has been explained to me, the falling results from a loss of balance capacity which is located neurologically in the same areas of the brain which are affected by PD -- and hence is a common PD ssymptom. I can't comment on the dizziness per se, except to note that I am incredibly groggy each am, with the onset either upon waking, or, what is more frequent and more frustrating, with the onset a half-hour to an hour after waking seemingly fresh as a daisy, and lasting anywhere from one to 6 hours. I've altered the timings and doses of each of my meds (eldypryl, sinemet, mirapex and zoloft) to try to identify the perpetrator, all to no avail. All I know is that this began about 2.5 years back. My physicians seem clueless as to why this happens. Regards, John Bachman 56/3.5