Hi Rosemary
I'd say definitely give Ebiza/Memantine a chance!
My mum started with Alzheimer's in her early 50's and been through Aricept with little response. She then switched to Ebixa a number of years ago, and it did wonders to her condition. I mean, it is all relative. She was bad on Aricept, then during the switch over, there was about a week when she was not on either, and she was the worse at that point, when she was constantly sobbing, and had no idea who I was, believing that I was 'her daughter's friend', when she told me: 'I must remember to tell my daughter how wonderful you are at helping me' when I was helping her in the loo. I was sad to hear that and had tears....
But,a few weeks into Ebixa, she turned around somewhat, and was able to function better in herself. Of course, now she's 65, and about 15 years into her disease, she is now completely dependent with regards to her daily living activities, and is not able to communicate in any meaningful way, and no longer recognises me as her daughter. However, we daren't stop the Ebixa for fear that there is a chance she regresses even more, if that is possible at all!!
Good luck though, hope it turns out well for you
X