I did mentioned to my doctor on this issue as i had been taking anticholinergic drug for 2 years. Doctor just brushed it off and instead prescribe an expensive drug to add on my existing one as a combo. I realized i'm getting forgetful more often and brain fog.
In my latest visit i told him i did not take it daily instead took it alternate day or 2 days apart. He told me that i could take the expensive one(which i had as combo) only and there is no need to take it daily. Brain fog gone and reduce in forgetfulness.
The expensive drug does not belong to anticholinergic class.