Hi i am a new member and have just been taken off Anastrazole took it for one yr. to my knowledge had no side affects, however it did not shrink the tumor in my brst thus the Dr. is putting me on Ibrance which i have not rec.d yet as it is mailed to my Pharmacy. i am losing hair however this could be due to my age as i am in mid 70's. feel fine so far plus take Flavadex and Xgeva injections as well for the tumor. hopefully this will help you as far as Anastrazole, i waited to long in going to a Canc Dr. and the tumor had already advanced in size, i certainly would not have waited as long as i did to take care of this, thought i was healing it through natural means.