Yes, it can be hard to tell sometimes whether it's the original illness or the AP side effects, but reducing dose/changing AP can suggest if it's one more than the other with some time and trial and error.

Risperidone was very bad for that for me. I took 1mg and felt great the first day; no anxiety whatsoever for the first time in ages. But then the next day, I didn't care about anything whatsoever, and the day after that I lost my ability to think clearly enough to speak. I even went down to 0.5mg, but I couldn't think, talk, drive, work etc so we stopped it. That was the worst one that affected me like that, and at such a low dose too.

But then even off APs for many months/years, I still get problems. My cognition has declined massively, my memory is pretty bad and I have to write everything down or I wouldn't get anything done, and some days I can't even understand English, my native language(!), so I guess then that is just me and not always meds.

Anyway, I recommend speaking to your pdoc about tweaking the dose down to see if that helps, or changing to something else. Personally I found aripirazole/Abilify the least unpleasant AP I've taken, but ymmv. There are also some pdocs here in the UK who will prescribe dementia drugs off-label (like Galantamine, Donepezil or Memantine) for sz cognitive issues, but I don't know about Finland.

I hope you find something that helps. My cognition is very important to me, so I can understand how distressing these issues can be

*Willow*