"Teenage Problems"
Your Brain On Drugs  

Heroin is a highly addictive opiate.  Brain cells can very quickly come to
rely on this drug to the extent that they need it in order to function.  While heroin
use starts with a rush of pleasure, it leaves the use in a fog for many hours
afterwards.  The greatest danger with heroin is the addiction.  Users soon find that
their sole purpose in life is to have more of the drug that their body has become
dependant on, and everything else becomes secondary to that need.
Heroin >
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