Cannabis

Research involving frequent older cannabis users indicates that smoking marijuana slows executive function but produces inconsistent effects on memory, suggesting the aging brain may process the drug’s acute effects differently than younger brains.

A new study shows frequent marijuana use increased among California 11th graders following the 2018 legalization of recreational retail. However, students in cities with bans on dispensaries reported lower usage rates than those with legal shops.

In a recent laboratory experiment, cannabis use was associated with reduced alcohol consumption among heavy drinkers. This substitution effect appears to be driven by a significant decrease in the self-reported urge to drink.

Cannabidiol is often seen as a protective component of cannabis. A new study challenges this idea in a specific group of patients, revealing a surprising and counterintuitive interaction between the two substances.

How does cannabis use during pregnancy affect the developing brain? A new study in rats explored the role of a key nutrient in brain development, finding that dietary changes could influence some, but not all, of the outcomes associated with...

Scientists may have found a reason why cannabis users who also smoke tobacco report worse mental health. A new study reveals that co-use is associated with elevated levels of a specific brain enzyme involved in mood regulation.

A study of adolescent twins links occasional cannabis use with increased psychotic-like experiences. The findings suggest the relationship is shaped by individual environments rather than shared genetics or specific brain connectivity patterns.

People who reported meaningful psychedelic experiences later showed reduced cannabis use and increased psychological flexibility. These findings suggest psychedelics might influence substance use behaviors in lasting ways, particularly when the experience is intense or transformative.

Inhaled CBD reduced inflammation and improved cognition in mice with Alzheimer’s, according to a study in eNeuro, pointing to a promising immune-based approach for treating the disease beyond traditional amyloid-focused therapies.

Researchers have found that a moderate dose of THC lowers connectivity between key brain networks in young adults. These changes, seen on brain scans, could help explain how cannabis use affects mood, attention, and perception during intoxication.

A promising new treatment for chronic low back pain has emerged from a large clinical trial. Published in Nature Medicine, the study found a cannabis extract provided significant pain relief while showing no signs of causing dependence, addiction, or withdrawal...

A new study suggests cannabis use may offer same-day reductions in PTSD symptoms and negative affect among veterans. However, the effects appear short-lived, raising questions about long-term reliance on cannabis for managing trauma-related symptoms.

A new study suggests that cannabidiol may not ease fear or panic when tested under controlled laboratory conditions. Canadian researchers found that even high doses of cannabidiol did not reduce fear responses triggered by carbon dioxide inhalation in healthy adults.

New research suggests that after a two-day break, frequent cannabis use does not impair simulated driving performance. These findings could influence public health policy and legal standards for determining cannabis-impaired driving, which often rely on past use indicators.

Scientists have discovered that THC and CBD push the brain in opposite directions. A neuroimaging study in rats shows that THC boosts connectivity and blood flow, while CBD dampens brain signaling—and combining them creates a more balanced effect.