I have put my mother on the Namenda XR twice but in both instances I feel like it has had a negative impact. She seems more out of it and more forgetful. What are some positive differences you have seen in your loved one when placed on it? Have you ever felt like it has had a negative impact? My mother is compulsive about cleaning and is very active for 81 years old. She was diagnosed a year ago. Should I keep her on it?