"psych meds" is a pretty broad category that's hard to generalize about. lithium is well-known to cause problems with short-term memory and associative fluency though stopping lithium (or sometimes lowering the dose) usually reverses this. nardil is not known to cause cognitive problems (and in fact antidepressants in general are not associated with cognitive problems other than the tricyclics which have anticholinergic effects).
can long-term use of psych meds cause memory loss?