Hi @CassieB
I also have her2 positive BC, I am on herceptin till September this year. Because I am ER+, I also take Letrozole. I have osteopenia diagnosed when I had a fall and had a cracked rib a few years back.Letrozole will lead to further bone loss and I expect when I have it tested again, I will also have osteoporosis and will need to take one of the medications. I have asked my Onco about these medications, however she has indicated that she will refer me to the bone specialist. A friend of mine is taking prolia and she has had no side effects.