About 2,490,000 results
  1. What is heroin and how is it used? | National Institute on Drug …

  2. Heroin | National Institute on Drug Abuse (NIDA)

  3. Heroin - Wikipedia

  4. What effects does heroin have on the body? | National Institute …

  5. Heroin - DEA.gov

  6. Heroin | Opioids | CDC - Centers for Disease Control and Prevention

  7. Heroin: Effects, Addiction, Withdrawal Symptoms, and Treatment

  8. Heroin: MedlinePlus

  9. What Is Heroin? Addiction Risk, Safety, and How to Get Support

  10. Heroin | Definition, Effects, Abuse, & Facts | Britannica