I'm using Huperzine A instead of Mestinon, but I have another condition in which I take Taurine. The Huperzine A tends to make me over excited, but the Taurine seems to calm me down a bit. I'm trying tea for the benefit of theanine right now and for some reason feel calmer with this balance. I even use vanilla extract in my tea and sometime chamomile tea to calm me down. The main thing that I notice is that I have less fatigue. I have to take the huperzine A every 4 hours, just like Mestinon, but I've read where other people didn't have to take it so often. I don't know why my body demands it every 4 hours. As far as memory and thinking abilities, I've noticed that I can read much faster and retain what I read.