My dad has prostate cancer that has spread to the bones. He just completed radiation therapy on a his lower and mid back. It totally drained him of energy and food no longer tasted good. He has to make a decision on whether to go on the Xtandi medication but we all feel clueless as to how to help him make a decision. My dad is 86 years old and has Parkinsons Disease. He has been good health otherwise. He officially "retired" in December so he has been active before now. I am afraid this new drug will completely wipe him out or he will fall and break something. Any thoughts?