I do not know anything about Namenda, but my neurologist just took me off of Lamictal (which my psychiatrist had me on). I have daily migraines. So far, it's been two weeks, I haven't noticed any decrease in migraines, but intensity has been down quite a bit some days. (I'm currently not on any preventatives as we see the role Lamictal might have on me.) So, if you are on Lamictal you may want to discontinue it and watch for three weeks what, if any, effect it has on you.View Thread