More like "Awakenings," I think. The trouble with a lot of these treatments is that they lose their effectiveness after a while. Still, so period of consciousness is of course preferrable to none at all.
I read an article about this and that is exactly what happens.
Now, they do wake up, and if you give them this pill, they wake up again. I don't know if that is a good thing or a bad thing. However, I think it should give people pause who have come to believe that the person is no longer "there". If they can be woken up, and recognize their loved ones, then obviously they are there, or not too far away.