Marijuana and Your Health: What 20 Years of Research Reveals – Yahoo News

People who drive under the influence of marijuana double their risk of being in a car crash, and about one in 10 daily marijuana users becomes dependent on the drug, according to a new review.

Marijuana use has become increasingly prevalent over the years, and the review of marijuana studies summarizes what researchers have learned about the drug’s effects on human health and general well-being over the past two decades.

In the review, author Wayne Hall, a professor and director of the Center for Youth Substance Abuse Research at the University of Queensland in Australia, examined scientific evidence on marijuana’s health effects between 1993 and 2013.

He found that adolescents who use cannabis regularly are about twice as likely as their nonuser peers to drop out of school, as well as experience cognitive impairment and psychoses as adults. Moreover, studies have also linked regular cannabis use in adolescence with the use of other illicit drugs, according to the review, published today (Oct. 6) in the journal Addiction.

Researchers in the studies still debated whether regular marijuana use might actually lead to the use of other drugs, Hall wrote in the study. However, he pointed to longer-term studies and studies of twins in which one used marijuana and the other did not as particularly strong evidence that regular cannabis use may lead to the use of other illicit drugs. [Marijuana vs. Alcohol: Which Is Worse for Your Health?]

The risk of a person suffering a fatal overdose from marijuana is “extremely small,” and there are no reports of fatal overdoses in the scientific literature, according to the review. However, there have been case reports of deaths from heart problems in seemingly otherwise healthy …read more