I've been on anastrozole for about 6 months now. I'm only taking 1,000 U of D3 oil. I will try your dosage. My doctor said EXERCISE, Exercise & Exercise! Of course I do not feel like exercise but have been trying and - it really does make me feel better! The YMCA has a program called Livestrong, a free 12 week program for cancer survivors. It is worth looking into if you have a Y nearby. I have arthritis in my knees, so it was hard to tell if the pain was from that or from the drug. I'm going to try to keep up the exercise & my best wishes for you. Yeah - 5 years seems like a long time (I'm 63) and 10 years seems like forever. I'm at least going to try for the 5 years. 🙂