A new study questions whether statins, a cholesterol reducing drug, are over-prescribed.  The study indicated that measuring calcium levels (via CT scan) instead of CRP (C-reactive protein) levels may be a better way of understanding whether a patient needs a statin treatment.  However, CRP tests are much cheaper than CT scans, and CT scans increase exposure to radiation, so more research and testing is needed.  Read more from the MSNBC Health article here.