I've been taking arimidex for almost 5 years after being diagnosed with estrogen positive stage l breast cancer. Both my surgical and medical oncologist want to take me off of it because of the danger of fractures. I've exercised and have lifted weights for years now as well as being on boniva and calcium supplements. Am I still at a high risk for fractures or are there additional reasons to discontinue it ? I've read where arimidex can be taken safely for years. What's the deal?