Palbociclib and Letrozole

Hello. My wife of 77 years has been taking these two drugs for 5.5 years. They have stopped the Cancer returning. Over the last 6/9 months she has developed ‘brain fog’ type symptoms and short term memory loss. Neither are age related. I have discovered that long term use of Lettozole can impair cognitive function and I was wondering if anyone else has experienced similar side effects and what if any action or steps were taken to help.

Thank you