I've been taking Anastrozole for 6.2 years and I had Stage 1a ER/PR + HER2- and a Oncotype score of 29 and a Mammaprint result of low risk. My oncologist ordered the BCI index test and my result came back that it would be beneficial for me to continue Anastrozole for another 5 years. However, my oncologist said continue just for 7 years (April 2027) and then we will stop. The doctor said there is no material benefit from staying on until 10 years instead of 7 years so that is my plan. My anastrozole has caused me to have osteopenia and hot flashes at night but I have managed. I know of several people who plan to stay on Anastrozole for life even though they have since past the 10 year normal stoppage period. I think they are convinced this is what has kept their cancer dormant.