Teen use of marijuana has jumped significantly in recent decades - by 245% since 2000, with over 30% of U.S. high school ...

Researchers analyzed health data on 460,000 teenagers in Northern California. The teens were followed until they were 25 years old.

News and commentary from the psychiatry world ...

As concerns about the possible health consequences of recreational cannabis rise in U.S. states where the substance is legalized, Yale’s Deepak D’Souza isn’t surprised. He first noticed the negative ...

Adolescent cannabis use doubles the risk of psychotic and bipolar disorders, with increased risks for depression and anxiety, by age 26.

Adolescent cannabis use is associated with an increased risk for new psychiatric disorders during key developmental stages.

As more and more states and the federal government continue to deregulate marijuana, one state is moving to reverse course ...