I have been taking Anastrozole for 3 1/2 months, started immediately after 2 months of radiation. I did not need chemo. Side effects of Anastrozole started within a week of starting which include trigger finger and backache across the middle of my back, but it is starting to deminish some, maybe because of exercise, vitamin D and my body adjusting. BUT, I am losing a lot of hair...I’m very concerned about how much hair I’m shedding. I was not prepared for this. I do have some problems sleeping buy I take ambien when I can’t sleep. I’ve been very emotional since about half way thru radiation and wonder if Anastrozole is also contributing to my bad mood.