Effects of Marijuana

Daily Marijuana Use Raises Concerns

Health officials are concerned that the rates of daily marijuana use by college-age Americans have returned or exceeded previously high levels seen in the early 1980s, especially among a population whose brains are still not completely developed.

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Legal Marijuana Laws Affect Teen Use

A study by researchers at Dartmouth has found that adolescents living in medical marijuana states with a plethora of dispensaries are more likely to have tried new methods of cannabis use, such as edibles and vaping, at a younger age than those living in states with fewer dispensaries. The study will appear in the August issue of Drug and Alcohol Dependence.

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How Is Weed Linked to Drinking Alcohol?

Adults who use marijuana are five times more likely to develop an alcohol use disorder (AUD) -- alcohol abuse or dependence -- compared with adults who do not use the drug. And adults who already have an alcohol use disorder and use marijuana are more likely to see the problem persist.

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Marijuana Poses Danger in Early Pregnancy

Marijuana is up to 20 times more potent than it was 40 years ago and most pregnant women who use the drug are unaware that it could harm their unborn child before they even know they are pregnant. Writing in the journal Drug Testing and Analysis, American researcher's state the argument that marijuana is a harmless drug is no longer valid due to the emergence of 'high potency' marijuana and synthetic marijuana which pose a potential real threat for pregnant women.

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Teen Pot Use Leaves Lasting Mental Deficits

The persistent, dependent use of marijuana before age 18 has been shown to cause lasting harm to a person's intelligence, attention and memory, according to an international research team. Among a long-range study cohort of more than 1,000 New Zealanders, individuals who started using cannabis in adolescence and used it for years afterward showed an average decline in IQ of 8 points when their age 13 and age 38 IQ tests were compared.

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