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Published byHoward Bates Modified over 9 years ago
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The most commonly used illicit drug in the U.S. 95 million Americans, ages 12 or older have at least tried marijuana at some point. ¾ illicit drug users claim to have used marijuana at least once within the past 30 days
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Main chemical = THC Effects: Some painkilling effects Relaxation Increased heart rate Lowered blood pressure Impairment of short-term and working memory Coordination Concentration
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A 2008 study by the University of Melbourne of 15 heavy marijuana users (consuming at least 5 marijuana cigarettes daily for on average 20 years) and 16 controls found: Average size difference for the smokers in the hippocampus (12 percent smaller) and the amygdala (7 percent smaller).
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Hippocampus = Responsible for creating and storing memories (learning) Amygdala = processing memory and emotional reactions
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A 2008 study at Karolinska Institute suggested that young rats treated with THC received an increased motivation for drug use, heroin in the study, under conditions of stress.
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Definition of a “gateway drug” a habit-forming drug that in many cases may lead to the use of other addictive drugs
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Regular marijuana use has been shown to be associated with other long-term problems, including: poor academic performance poor job performance increased absences from work cognitive problems lung damage
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