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Marijuana and Health
Addiction The Brain and Mental
1 in 10 people who try marijuana will Health
become addicted to it,developing a
dependence that produces withdrawal, Marijuana use directly affects the brain,
cravings. specifically the parts of the brain
If marijuana use starts in adolescence, responsible for memory,learning,
the chances of addiction are 1 in 6.i attention,and reaction time.These
Long-term studies from the USA and effects can last up to 28 days after
New Zealand have shown that regular abstinence from the drug.v
cannabis smokers report more Science confirms that the adolescent
symptoms of chronic bronchitis than brain,particularly the part of the brain
non-smokers.ii that regulates the planning complex
And today's marijuana is not the cognitive behavior,personality
marijuana of the 1960s;potency has expression,decision-making and social
tripled in the past 15 years,according to behavior,is not fully developed until the
a 2009 report from the U.S.government. early to mid-20s.Developing brains are
It has grown 5 times since 1960. especially susceptible to all of the
In the U.S.since 1990,more people have negative effects of marijuana and other
gone to the emergency room after using drug use-vi
marijuana even though the overall Marijuana use is significantly linked with
numbers of marijuana users has mental illness,especially schizophrenia
remained relatively stable.iii and psychosis,but also depression and
In the U.S.,cannabis emergency rates anxiety.vii
have been rising sharply for cannabis- �fJu� �����
related admissions.Visits to hospital The
emergency departments because of Marijuana use can cause an increase in
cannabis use have risen from an the risk of a heart attack more than four-
estimated 16,251 visits in 1991 to more fold in the hour after use,and provokes
than 374,000 in 2008.iv chest pain in patients with heart
disease.viii