Pubdate: Wed, 09 Jul 2014
Source: San Francisco Chronicle (CA)
Pubdate: 9 Jul 2014
Author: Kathryn Roethel
Page: D3

NIH TAKES NEW LOOK AT OLD MARIJUANA STUDIES

Recreational marijuana has been legal in Colorado for just over six 
months, and sales figures and national public opinion polls show the 
idea has caught on. But a study reveals the drug does come with 
risks, and there are still a lot of health questions that haven't 
been answered.

Scientists from the National Institutes of Health published a review 
of existing marijuana research in the New England Journal of Medicine 
in June. The findings showed the drug comes with some chance of 
addiction, and the risk is higher for teens. Driving after using pot 
increases the odds of being in an accident, but not as much as 
drinking does. And more research is needed to answer other marijuana 
health and safety questions, like consequences of secondhand smoke, 
the impact for pregnant women and babies, and the therapeutic 
potential of the individual chemicals found in the marijuana plant.

Washington and Colorado have legalized recreational marijuana for 
those over 21, and Colorado saw more than $200 million in sales in 
the first four months. California and 17 other states, plus the 
District of Columbia, have legalized pot for medicinal use, and many 
are considering legislation that would legalize it more broadly. 
California's Proposition 19 failed in 2010, with only 46.5 percent of 
voters favoring it, but polls show more of the state's residents 
support the idea now. However, the issue won't be on the ballot this year.

Here's a look at some of the marijuana math:

12%

The percentage of people 12 years and older who reported using 
marijuana in the past year, the New England Journal of Medicine 
review found. About 9 percent of people who experiment with marijuana 
will become addicted, but the percentage rises to about 17 percent of 
those who start using as teens.

60%

The percentage of high school seniors in the U.S. who said they do 
not think regular marijuana use is harmful, and 6.5% said they used 
the drug daily or near daily.

2x

The New England Journal of Medicine report found risk of a car 
accident doubles when a person drives soon after using marijuana. By 
comparison, chance of an accident is about five times greater than 
normal for drivers with blood alcohol levels above 0.08 percent.

12%

The average THC content, or potency, of marijuana samples police 
confiscated in 2012, according to the journal study. This is up from 
an average of 3 percent in the 1980s, causing scientists to doubt the 
current relevance of older marijuana studies.

55%

The percentage of Californians who favor legalization of recreational 
marijuana use, according to a December 2013 Field Poll. It marked the 
first time in the poll's history that a majority of state residents 
favored making the drug legal.

For more on the New England Journal of Medicine's Marijuana Review: 
http://1.usa.gov/1rO3u97
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MAP posted-by: Jay Bergstrom