Side effects of Femara

Ah well, I think I have just agreed to do another year of femara!!  My bone density tests are interesting - from an excellent bone density rating at the start ("for my age" as everyone feels obliged to say!), my bone density has gone down, but not too much. My left hip has always been the worst bit of me (I blame carrying children!) but my density in some areas has actually improved since my last test 2 years ago. Thank you low fat milk, calcium tablets and weightlifting!  Problem is that while recent research indicates 5 years good, 10 years better for femara as well as tamoxifen, no-one knows where this curve lies, ie do you get an incremental benefit every year or do you need to take it for at least 8 years for the benefit to kick in? Not known it seems. Ditto bone density - not sure if it gets worse gradually (mine actually hasn't) or in spikes. So taking femara longer may improve my chance of not getting cancer back, but it may also increase my chances of osteoporosis (which I don't have). I am thinking, and my oncologist is supportive of whatever choice I make, of continuing femara on a year by year with bone density monitoring - plus having prolia shots to assist in safeguarding my hip. Be interested if anyone else has been on this path and their experience.