Cannabis

New research has found that inattention symptoms predict functional cannabis-related harms like academic difficulties and memory blackouts, while hyperactivity symptoms are linked to heavier use and increased dependence, pointing to distinct risk pathways in young adults with ADHD.

People diagnosed with cannabis use disorder tend to perform worse on memory and thinking tasks, according to new research. The study found moderate cognitive deficits, especially in learning and processing speed.

A non-intoxicating cannabis compound may help protect the brain from the damaging effects of chronic social stress. New research shows cannabidiol reversed stress-related changes in behavior and gene expression in mice exposed to repeated social defeat.

A new study suggests that children exposed to cannabis in utero show reduced brain activation during reward anticipation—especially in the striatum—and are more likely to report psychotic-like experiences during adolescence. The findings provide evidence of altered neural development tied to...

Preliminary findings from a Canadian sleep lab indicate that cannabis use may be associated with hypersomnia-like patterns on the multiple sleep latency test. Though non-significant, the trends raise concerns about diagnostic accuracy in patients who consume cannabis near testing.

A 31-year-old man amputated his ears and penis while in a psychotic state after consuming cannabis and kratom. The case report underscores the rare but severe psychiatric risks of these substances.

A study of adults with anxiety found that cannabis products with higher cannabidiol (CBD) content tended to improve mood and sleep regardless of inflammation, while the effects of THC-dominant cannabis varied with participants’ baseline inflammatory status.

A new clinical trial has found that a single dose of cannabidiol can reduce alcohol craving and dampen activity in a brain region tied to reward. The findings point to CBD’s potential as a treatment option for alcohol use disorder.

Does cannabis help or harm memory in older age? A new study in rats suggests the answer is complex. Researchers found THC’s effects depended on sex and delivery method, improving working memory in some cases while impairing it in others.

A new study shows that only one form of hexahydrocannabinol—9(R)-HHC—produces behavioral effects similar to THC in mice, raising concerns about its psychoactive potential. The findings highlight key differences between HHC variants commonly sold as cannabis alternatives.

While many people use cannabis to help them sleep, a new study reveals a surprising outcome. Researchers found a single dose of a medicinal cannabis oil actually decreased total sleep time and significantly suppressed the REM sleep (or dreaming) phase.

Nineteen patients with drug-resistant epilepsy experienced seizure freedom after cannabis oil treatment, with a median seizure-free duration of 245 days. Five remained seizure-free for over a year, and most reported improved quality of life and reduced seizure frequency.

Researchers have discovered that frequent cannabis users show reduced spontaneous brain activity in the motor cortex, and this neural suppression is tied to cannabis use severity and response speed, even though overall task performance remained comparable to non-users.

Cannabis products promise custom experiences based on compound profiles, but the science behind these claims remains limited. While ideas like the “entourage effect” are popular, research on how cannabis compounds interact in humans is still in its early stages.

In a study using an Alzheimer’s disease mouse model, researchers found that cannabidiol reduced memory loss and brain abnormalities. The compound worked by enhancing the function of glycine receptors, which help regulate neuronal activity in the brain's memory center.