There were 22.5 million people in the United States over the age of 12 who used an illegal drug in 2011, according to the National Survey on Drug Use and Health. Nearly 9 percent of the American population regularly used illegal drugs such as marijuana, cocaine, heroin and abused prescription drugs.
There were 1.4 million users in the United States who used cocaine, down from the 2.6 million regular users in 2006. (Click to see global cocaine prices)
There were 281,000 users of heroin in the US in 2011, up from 161,000 users in 2007.(Click to see global heroin prices)
6.1 million people regularly abused narcotic pain pills, tranquilizers, stimulants and sedatives in 2011, down slightly from the 7 million in 2010.
Source: Donna Leinwand Leger, “Prescription-drug abuse drops among young people,” USA Today, September 25, 2012.