Hey @Michelle B and @iserbrown hope you are both doing OK! thats great Michelle, I do think the side effects are most likely more Arimidex. I too was surprised post chemo that my bone density was so bad, I had no clue! I was put onto Vit D the minute I finished chemo. I don't suffer any major probs with Prolia at all as in side effects, I have had about 7 now and my Oncologist last week decided to give me another 2 which is 6 monthly. Ive only had 1 bone density scan since at about 18 months post chemo and 2 injections later minimum. When are you having another one? mine was really good and honestly I feel fine :) x