The Word on Memantine?

I'm just wondering if there's any agreement on the use of memantine as a nootropic. I got interested in it because some people claimed it could partially reverse/reduce tolerance to dopaminergic stimulants (adderall, modafinil, coffee), others said it could help with anhedonia (which I sometimes suffer from) and help improve memory, reduce anxiety. Our beloved [/u/MisterYouAreSoDumb](reddit.com/u/misteryouaresodumb) advocated its use, which made me really want to look into it.

Unfortunately, I've since found reports of people complaining that after using memantine for a few months, they came off of it because it actually seems to make their memory worse, that it reduces your ability to learn (contradicting the aforementioned claims). Some people also complain of chronic tiredness. The memory/learning issue is really what scares me most, however. My work involves much programming/engineering work, and the ability to learn things quickly is crucial. If I can't learn, I can't do the work I love.

Personally, I started taking 3mg/day about a week ago. Seems like my anxiety is a bit reduced. It initially seemed like I had a slight boost in motivation, I became very obsessed with my wo…