I don't have schizophrenia but I have cognitive problems. I have bipolar. The thing with cognitive issues for me is they come and go in waves. Sometimes I can barely type a scentance or put my thoughts together and hold them in place. Other times I'm totally fine. It's like a tidle wave just washes over me then goes away again.

I struggle with reading, focus, memory, and processing which are all executive cognitive functions and not intellectual cognitive functions (which includes things like your IQ.)

The only AP I've been on is abilify and had a bad reaction to it so in that area I don't know.