No, you have my sympathies! I'm just anticipating the worst, but you've been through it!
The "non-recognition point" with my father was when I walked in, and he said, "Who are you?". When I identified myself, he held his hand out, about waist high, and said, "No you're not. My son is a little boy about this tall..."
Watching Alzheimer's take over a once-brilliant person is like watching the lights in a great city blink off -- one by one...
I pray that this medication test is a big success!