Finasteride, the active ingredient in brand-name drugs Proscar, for enlarged prostates, and Propecia, for baldness, has been shown to lower the risk of prostate cancer. But doctors haven't jumped to prescribe it. Stephen Chernin/Getty Images hide caption

toggle caption Stephen Chernin/Getty Images

MRSA bacteria like these are on the run in hospitals. CDC hide caption

toggle caption CDC
Drug-Resistant Staph Infections Decline In Hospitals
  • Download
  • <iframe src="https://www.npr.org/player/embed/129111555/129112326" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript