More than nine million people in the United States use prescription drugs to sleep according to a new study.

The researchers surveyed around 17,000 adults between 2005 and 2010 of which around 4 percent admitted to having taken a prescription sleeping pill or sedative to help them sleep in the past month.
Though this is the first time that such a study is being conducted, the researchers calculated that prescription sleeping pills use has risen by 3.3 percent between 2003-2006 to 4.3 percent during 2007-2010.
Source-Medindia