A meta-analysis of more than 80 studies from the past four decades finds weak evidence to support the use of medicinal cannabis to treat anxiety, depression, and other mental health disorders.

The animals showed changes in both slow wave and rapid eye movement sleep.

Recent federal announcements serve as reminders that in the US policy continues to outpace science when it comes to cannabis.

Proteins that synthesize, bind, and degrade endocannabinoids are present in the body’s sperm factories, suggesting that the use of cannabis may directly affect them.

The federal government cautions that the drug can affect brain development in both teens and fetuses.

After years of stalling, the agency says it plans to provide notice on pending applications from growers—but only after it establishes new regulations for suppliers.

A brazier and charred stones, thought to be part of burial ceremonies, preserve signs that people used the drug thousands of years ago.

Frequent use of high-strength cannabis may increase the risk of mental health problems, according to a large-scale epidemiological study.

Rodent and human studies have revealed a multitude of effects starting during gestation and lasting into adulthood.