Q: Can Parkinson's disease lead to Alzheimer's disease? Or do the medication of Parkinson's result in diffuse cerebral atrophy?

A:No, Parkinson's disease doesn't lead to Alzheimer's, but the end stage of Parkinson's may include loss of memory and mental function that look similar to Alzheimer's. No, medications for Parkinson's do not lead to cerebral atrophy. But neither do the medications stop mental deterioration caused directly by the Parkinson's disease.