I dont know. But I have read that it is not clear whether cognitive impairment, memory problems, concentration problems, are due to the underlying depression or due to the medication that is supposed to treat that depression.
When I was 20 years younger I considered myself quite "bright" and my memory was ok. After many depressions, substanse abuse, different meds, manic episodes, now I don't consider myself bright anymore. I have a huge brainfog and my memory is so-so although it is selective, sometimes I can remember trivial things and some not. Like Brat Pitt or Jack Nicholson. Why the *** do I remember those names now and at other times I don't remember them. This is not a joke by the way.