Why Is Heroin so Addictive?
Heroin rewires the brain, overriding the pleasure receptors in the brain. When heroin crosses the blood-brain barrier, it is transformed chemically into morphine. The morphine then binds to the opioid receptors in the brain. This gives the user a rush of euphoria or pleasure. When the individual uses the drug again, he or she is looking for another rush. However, the drug becomes less and less potent for the individual as time goes on, leading to heroin dependency.