Gupta: Let's end the prescription drug death epidemic

Editor's note: Dr. Sanjay Gupta, associate chief of neurosurgery at Grady Memorial Hospital and CNN's chief medical correspondent, is the author of the novel "Monday Mornings." Don't miss his "Deadly Dose" documentary at 8 p.m. ET Sunday.

It's the biggest man-made epidemic in the United States. That's how a doctor in Washington state described it to me as we sat outside the state Capitol in Olympia.