People who regularly use marijuana experience changes in their brain structure and function, but it’s not clear that cannabis is the cause, a new study finds.

Researchers found specific differences in the brains of people who’d ever used weed, particularly in areas densely packed with cannabinoid receptors. However, genetic analysis couldn’t pin down any specific associa...

Weed use among U.S. teenagers fell dramatically over the past decade, a new study shows.

By 2021, only about 16% of teens said they were currently using marijuana, down from 23% in 2011, researchers found.

All grades experienced a notable decline in current weed use, particularly among ninth graders, researchers said.

Further, the percentage of kids who tried weed for the firs...

Smoking marijuana during pregnancy may quell your morning sickness, but it could also harm your child’s development, a new study warns.

Cannabis exposure in the womb is associated in early childhood with poorer thinking skills, researchers reported Oct. 28 in the journal JAMA Pediatrics.

These kids also have behavioral problems like impulse control, poor attention an...

The number of U.S. children who suffer seizures after swallowing prescription medications or illicit drugs has doubled in recent years, a new study finds.

Drug poisonings among kids resulting in seizures increased from 1,418 in 2009 to 2,749 in 2023, steadily rising about 5% each year, results showed.

These cases doubled among children ages 6 to 19 during that 15-year period, resear...

Generations of parental warnings may not be wrong: A massive study of available data finds teens who use marijuana have significantly worse outcomes at school.

Data from 63 studies involving almost 440,000 youths found "cannabis use during adolescence is probably associated with lower school grades; less likelihood of high school completion, university enrollment and post-secondary degree...

If you're in chronic pain and believe medical marijuana to be the solution, there's a good chance your doctor might not agree.

In a new survey of people living in states where medical cannabis is legal, 71% of people with chronic pain thought the federal government should legaliz...

A synthetic form of the active ingredient in cannabis helps reduce agitation in people with Alzheimer's, new research shows.

Synthetic THC (dronabinol) also gave patients' caregivers a boost, according to findings presented Thursday at a meeting of the...

The stereotype of the slacker stoner might not be too far off the mark, a new study shows.

People who use weed are prone to workplace absenteeism -- and the more problematic the cannabis use, the more likely they are to skip work, results showed.

“These findings underscore the impor...

Regular bedtimes won't just help your child be alert for a busy school day; they might also help keep them from abusing drugs or alcohol as a teen, new research suggests.

Youth who'd had early bedtimes in childhood and adolescence were significantly less likely to be drinking or using marijuana by the time they were 15, compared to kids who'd stayed up late and had fewer hours sleep, rese...

People who use marijuana at high levels are putting themselves at more than three times the risk for head and neck cancers, new research warns.

The study is perhaps the most rigorous ever conducted on the issue, tracking the medical records of over 4 million U.S. adults for 20 years.

Given the surging popularity of marijuana, cases of head and neck cancers "attributable to cannabis...

As marijuana loses much of its stigma and laws around its use relax, Americans are increasingly consuming it medically and recreationally.

Americans with diabetes are no exception, a new study finds.

The number of adults with diabetes who said that they'd used cannabis at least once over the past month...

There's a slight but significant rise in dangerous obstetric complications for pregnant women who use marijuana, new research shows.

Data from almost 317,000 pregnancies in women in California found those who used the drug had higher odds for gestational hypertension, preeclampsia, weight gain that goes beyond recommended levels and a condition known as placental abruption (when the plac...

In a joint effort to curb the illegal sales of food products containing delta-8 THC, the U.S. Food and Drug Administration and the Federal Trade Commission said Tuesday they have warned five companies to stop marketing such products.

Because the packaging for these THC edibles mimics that of popular snack foods, the FDA said it is concerned they can be easily mistaken for traditional food...

Cannabis use during pregnancy might affect the way a child's brain develops after birth, a new study says.

Brain imaging of children exposed to cannabis in the womb has revealed patterns consistent with reductions in brain inflammation, researchers reported July 4 in the journal Nature Mental Health.

Too much ...

As marijuana use becomes legal and more accepted across America, more seniors are developing unhealthy relationships with the drug, a new report suggests.

A look at data on almost 56 million Medicare beneficiaries finds "rates of health care encounters with cannabis-related disorders increased from 2017 through 2022," according to a study led by