Wellbutrin made me sharper in the beginning. Though I have experienced the lapses you refer to. There are times in which I'm typing out my thoughts and its clear that I have omitted important words.
But exactly what this is, I'm not sure. How Wellbutrin effects memory or how wellbutrin even works aren't fully understood.
Well, I'm told part of its action is that it allows for the re-uptake of dopamine like SSRIs allow for the re-uptake of serotonin.
Not that I know of, but wellbutrin is a relatively new drug for tests like memory-loss to have been completed I think.
Funny that you mention this bc I've had it happen a couple times too but then again, I've always had a really good memory, so attribute it to something else. For example, my memory effecitiveness is terrible when I don't have enough sleep.