Heroin goes by many names. This intensely addictive drug is typically used by injection with a needle. Once it enters the body, heroin blocks the pain receptors in the brain, inducing a numb, euphoric state for a period of hours.

Only around 1% of high school seniors have tried heroin, but each teen who experiments with the drug is at risk for the drug’s many serious side effects. Between 2002 and 2013, heroin use in the U.S. jumped 63%. In 2009, 21,000 Americans sought treatment for teen heroin addiction.