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What is heroin and how is it used? | National Institute on Drug …
Heroin - Wikipedia
Heroin: Effects, Addiction, Withdrawal Symptoms, and Treatment
Heroin - DEA.gov
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Heroin | National Institute on Drug Abuse (NIDA)
What Is Heroin? Addiction Risk, Safety, and How to Get Support
Heroin: MedlinePlus
What effects does heroin have on the body? | National Institute …
Heroin: Effects, Addiction & Treatment Options - Drugs.com