I'm happy you've posted here at the BP forum since you're using this approach for BP. I probably would have missed this if it wasn't posted here, as it's very time-consuming to try to keep up with several sub-forums.
So...Great!

I am very happy for you!
My pdoc had briefly mentioned this option.
Memantine is also used in treatment of chronic pain.
Your account is very interesting!
Thanks for sharing!

WC