On Namenda for 12-15 years by psychiatrist. 3+ years ago first neurologist diagnosed Parkinson's. Then second severe brain atrophy. Then atrophy with a compressed spine and Alzheimer's. Now Parkinson's with a duel diagnosis of Alzheimer's. The doc is beyond reputable. The brain must really be an elusive organ to master. I find it so confusing as a caregiver to know what to look for, how to proceed. I like to be prepared (yes probably control issues). I guess it is a lesson in living in this 24 hours and look for tomorrow's needs tomorrow.