Heavy weed use may be far more dangerous than people realize, according to a pair of studies published in JAMA Network Open.

If you think quitting cannabis means your brain will bounce back immediately, think again. A groundbreaking new research ...

A new study from Canadian researchers has found that the proportion of new schizophrenia cases associated with cannabis use ...

Millions of Americans use cannabis and would like to think the products they buy are safe. But regulation is state by state ...

One of the largest studies to date found more frequent use of marijuana over time reduces the ability to remember key ...

Marijuana has been recreationally legal here in Washington since 2012, and it's become big business for the ... Now, doctors are seeing more harmful, and sometimes fatal consequences from overuse ...

“Can the adolescent who used cannabis more than 1000 times between the ages ... and they then had abstained for 10 years? Or had they become recent heavy users? “Even if a chronic user had ...

As cannabis legalisation expands and marijuana products become more potent, scientists are racing to understand the drug’s long-term effects. Researchers from the National Institute on Alcohol ...