I have been on Xtandi for metastic prostate cancer for the last 3 months. I am part of the Phase 3 trial and I am only on Xtandi. The first month was a breeze, now two months later I have aged 10 years. Worst is the memory problem and I can't get answers as to whether this will get worse. I can't remember, I can't reason, and I sometimes feel lost. I had none of this 2 months ago. I strongly feel that the Xtandi has caused this but the doctor told me to see a memory specialist. Great, so they will give me another med with additional side effects. I don't know if I should ask to be off the trial and switch to another drug. I don't want my cancer to explode and yet I don't want to develop total dimentia. Will the memory problems reverse now if I get of the drug? Any opinions?