I will say right off. Every person has different experiences and because of that comes away with different conclusions. I will share mine here
I took Anastrozole for a year and a half. I experienced a variety of side effects that were mostly tolerable. About 6 months ago my knee started progressively getting more and more painful and limited me significantly.

In discussion with my oncologist I went on a hiatus a month ago from Anastrozole for 3 months.

Most all of my minor side effects have gone and my issues with my knee has ebbed almost totally.

The most gratifying realization involved a side effect I had read was possible but did not comprehend was happening to me. IT WAS CALLED BRAIN FOG!

A couple of weeks into my hiatus I felt like I was indeed walking out of a fog in my perceptions, understanding, and interactions in general. It was a gift I didn’t expect because I didn’t know I was experiencing.

As I started out saying - every one is different in their experiences. I just had to respond to you when I read what you shared. I am thinking our brains are inadvertently sometimes blocked by this fog as a result of Anastrozole. I am so happy I can appreciate this difference that was effecting this vital part of my being.