I have had the opposite experience. My cognitive function tanked before I started meds. Getting them worked out has meant I can be much more functional than I was before, but that's a recent enough experience that I can really tell the difference.

So some of that is also about your baseline. What are you comparing your current functioning to? Before you got sick? When you're hypo/manic? Those aren't fair comparisons.

If you're seeing a T or a pdoc, these are probably good concerns to bring up. A doc would hopefully be better able to determine whether a meds change might help.