I have been on Anastrozole for 6 years now after breast cancer and suffer from migraines every 7 days. I’m post menopausal so I feel its definitely related to the Anastrozole. Ive searched the internet to find if this has occurred with others but this is the first post Ive come across. I think i may have to go back to oncologist and see what alternatives I can try although I feel all these drugs work in the same way.