I know what you are experiencing right now and my heart really goes out to you....my father suffered for four years with dementia....it progresses so fast and his diagnose was so late that we had no other recourse than to use traditional western medical pharms in the treatment.
However, there are some herbal supplements that we utilized to improve his overall cognitive function after the diagnose that we did see a marked improvement after about a month of treatment.....one was a very common over the counter supplement named Gingko biloba. You attain this from any supplement or drug store. I seen a marked improvement in my father's memory function once this herbal was introduced in conjunction with Exelon.
I researched and researched looking for something that would possibly do a better and I ran into a medication that I wasn't able to incoporate with his therapy before he passed from his heart condition....it is called memorise....here is the link...I have heard very good things about this supplement....so if the basic Gingko biloba supplement doesn't improve her cognitive function and memory you might want to try it...here is the link with information on the supplement....
http://www.nativeremedies.com/products/memorise-memory-loss-techniques-info.html?ovchn=INK&ovcpn=SiteMatch&ovcrn=memory&ovtac=PIB
cut and paste this link in your web browser and it should take you directly to the page.
Another site I found of interest that I was going to try before he passed was a chinese herbalism approach....you might what to check them out too....they looked very promising...if only I was able to try them out before his demise...here is that link
http://www.herbchina2000.com/therapies/NTL.shtml
they are a bit pricey. I don't know about you....but I know that when I Was caretaker to my father when he developed dementia, no cost was too great to keep him happy and comfortable.
I will keep you in my prayers.....know that if you ever need anyone to talk to, you can pm me anytime. Blessings to you and yours.