Coalitions are “re-mixing” what “420” means to youth, changing the perception that marijuana is not harmful, and are re-claiming April 20th from an unofficial marijuana smokers’ “holiday.”

The most widely accepted theory of "420's" origination is that in the 1970s, high school-age stoners in Northern California congregated at 4:20 p.m. daily. "420" has evolved into an unofficial marijuana holiday. 

Washington, D.C. – On behalf of CADCA’s (Community Anti-Drug Coalitions of America) 5,000 community coalitions across the country, we commend Sen. Charles Grassley (R-Iowa) and Sen. Dianne Feinstein (D-Calif.) for holding the Drug Caucus hearing yesterday on “Is the Department of Justice Adequately Protecting the Public from the Impact of State Recreational Marijuana Legalization?”

Marijuana use disorder is common in the United States, is often associated with other substance use disorders, behavioral problems, and disability, and goes largely untreated, according to a new study conducted by the National Institute on Alcohol Abuse and Alcoholism (NIAAA).

As marijuana legalization gains momentum across the country, more states are looking to let either lawmakers or voters decide on the drug on the 2016 ballot. At least 10 new states are expected to consider whether to legalize marijuana for some degree of use, but Idaho won’t be one of them.

A petition to legalize medical marijuana and decriminalize possessing up to three ounces of marijuana in Idaho for the November ballot has been withdrawn.

Several studies have linked marijuana use with a variety of health outcomes among young adults. One new study, “Marijuana use trajectories during college predict health outcomes nine years post-matriculation,” found that even small amounts of marijuana use during college could have adverse health effects later in life.

Several National Institutes of Health agencies will host a marijuana research summit March 22-23 in Bethesda, Md.

The event, “Marijuana and Cannabinoids: A Neuroscience Research Summit,” will focus on the neurological and psychiatric effects of marijuana, other cannabinoids, and the endocannabinoid system. Both the adverse and the potential therapeutic effects of the cannabinoid system will be discussed.

Adults who use marijuana are five times more likely to develop an alcohol use disorder—alcohol abuse or dependence— compared with adults who do not use the drug, a new study finds.

The age at which a teen begins using marijuana may affect typical brain development, according to researchers at the Center for BrainHealth at The University of Texas at Dallas.

Medical News Today reported this week about a new study that reveals that both past and present marijuana use is linked with worse verbal memory in middle age.

The researchers - led by Dr. Reto Auer of the University of Lausanne in Switzerland - published their work in JAMA Internal Medicine.

They used data from the Coronary Artery Risk Development in Young Adults (CARDIA) study, which contains 25 years of marijuana exposure measurements, beginning in early adulthood.

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