Cause
People don't use drugs because they want to be
addicted. Most of the time,
drug abuse starts with casual use.
How does casual drug use turn into abuse or dependence?
Drug use changes your brain structure and how it works. If you
continue to use the drug, you may develop strong cravings for the drug, and it
may get harder to say "no” to further drug use. At the same time, you may begin
to lose interest in activities you always enjoyed. This is because you may feel
that they are not as enjoyable as using drugs. You may then become dependent on
the drug.
Not everyone who uses drugs abuses them or becomes dependent. Other
things that influence whether this happens include your
genes, family, friends, and life situations. See the
What Happens and What Increases Your Risk sections for more information.