I also tried Memantine, my verbal fluency took a serious nose dive, I was unable to follow simple instructions. I slowly tapered up, much slower than 2.5 mg at

I also tried Memantine, my verbal fluency took a serious nose dive, I was unable to follow simple instructions. I slowly tapered up, much slower than 2.5 mg at a time. It helped in some other areas, but not being able to do simple tasks nixed it for me.