The type of opioid that is most used non-medically varies across regions and countries.

• With the highest population globally, Asia is also the region with the highest number of people who use opioids.
• The type of opioid used differs across regions, with opiates such as heroin dominating in Asia and Europe and the non-medical use of pharmaceutical opioids such as tramadol, codeine, oxycodone or fentanyls being more prevalent in other regions.