Since you started memantine concurrently with the subsidence of Exelon, it's hard to know whether the observed changes are the result of the introduction of one drug or the reduction of another. Have you ever tapered Exelon before, with no concurrent introduction of another drug? If so, what were your observations?
What stage of dementia/AD is your loved one?
Glad to hear you're getting some peace and mom is regaining some cognition and lucidity. Small things can be large gifts....
Best wishes!
Pat