Heroin can be injected into a vein or a muscle. It can be smoked in a pipe or mixed with a marijuana joint or a regular cigarette. Its smoke can be inhaled through a straw, a process known as "chasing the dragon." As a powder, it can be snorted.
Users who inject heroin feel is effects the quickest. When heroin is mainlined, users can usually begin to experience a feeling of euphoria within 7 to 8 seconds. When it is smoked, the user will typically feel its peak effects in 10 to 15 minutes.
Traditionally, the majority of people seeking treatment for heroin abuse were injection drug users, but the availability of pure heroin has created a shift toward sniffing and smoking the drug, particularly among young users.
The higher purity heroin that can be snorted or smoked also appeals to new users, who may be leery of injection drug use, according to the National Institute on Drug Abuse.
No matter how heroin is used - injected, snorted or smoked - it is highly addictive for the user.
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National Institute on Drug Abuse. "Heroin." Research Report Series Updated January 2014
The Partnership at DrugFree.org. "Heroin." Drug Guide. Accessed March 2014.