It is estimated that 9.2 million people use heroin worldwide.
Some of the health risks of heroin use include:
Infections of the heart lining and valves
In 2014, there were over 11,000 deaths in the United States from heroin overdose.
The number of deaths from heroin overdoses increased six-fold from 2001 to 2014.
Deaths among females due to heroin over overdoses have doubled since 2002.