between 1996 and 2013, the number of adults filling a benzodiazepine prescription increased from 8 to nearly 14 million. i want to know more about these drugs. how risky are they? and how are we supposed to know? >> i'll go ahead and show you where these are kept. >> mohammed works in a family-owned drugstore in the suburbs of chicago. >> we always hand them these leaflets. >> each prescription comes with a manufacture's leaflet instructs patients on what they're about to gulp down. avoid drinking alcohol, driving, tasks and actions that call for you to be alert.