Evista - Another Osteoporosis Drug: osteoporosis is seeking approval to be marketed for breast cancer prevention. Women with heart disease or a high risk for it would trade one set of odds for another if they took the drug raloxifene (Evista) to try to prevent breast cancer Evista, may help prevent cancer, but raises the risk of blood clots and fatal strokes. Breast cancer is more treatable than life threatening heart attacks and strokes. (Learn how safe it is or is not on MSNBC)