The number of treatment options for prostate cancer has exploded over the last decade. That trend is showing no signs of letting up, with the Food and Drug Administration’s (FDA) recent decision to expand the approved uses of enzalutamide (Xtandi) to treat people with prostate cancer that hasn’t spread, or metastasized, to other parts of the body. Under this new approval, announced on , Xtandi is used to treat certain types of prostate cancer. Common side effects include hot flashes, constipation, diarrhea, and muscle or joint pain. Xtandi needs to be swallowed whole., Xtandi is a brand-name prescription drug that's used to treat certain types of prostate cancer. Learn about side effects, warnings, dosage, and more., , , .