Hey ! Thanks for reaching out. I don't have personal experience with Arimidex, but I did find this forum post from another member who said they tried it. The post is from a few years ago, but it's worth a try to reach out and see if they can give you some advice! https://endometriosis.net/forums/aromatase-inhibitor-for-endometriosis I hope that helps! Let us know if you have any other questions! Warmly, - Kat (Team Member)