MYNORTHWEST NEWS

Study: Stressed rats more likely to seek pot

Dec 12, 2025, 5:00 AM

rat nap...

A rat takes a nap. (Photo: Taylor Weidman, Getty Images)

(Photo: Taylor Weidman, Getty Images)

A new study shows it might not just be stressed-out people who like to relax with a little cannabis.

Stressed-out rats were more likely to seek relief from cannabis than their non-stressed counterparts. Researchers at Washington State University said that’s what they found when they gave rats the option of sticking their noses into a port containing cannabis vapor.

Rats with higher stress dosed more frequently

They found that rodents — with higher baseline stress hormones — chose to self-dose more frequently.

The scientists said they ran the rodents through a battery of behavioral and biological tests.

“What we found was that when we look at all of these different factors and all the variables, stress levels seem to matter the most when it comes to cannabis use,” Ryan McLaughlin, associate professor in the WSU College of Veterinary Medicine, said.

Researchers said now that more states are legalizing pot and cannabis products, it’s important to better understand the effects of the drug and who’s drawn to it.

The study is published in the journal Neuropsychopharmacology.

Read more of Heather Bosch’s stories here.

Please follow our Community Guidelines

MyNorthwest News

Deception Pass SR 20 closures...

Chris Sullivan

19 days of closures to start Monday on SR 20 near Deception Pass

WSDOT will activate temporary traffic signals on SR 20 at Campbell Lake Road. They will allow one direction of travel through the construction zone for 19 days.

34 minutes ago

Storms haze seattle fire...

Meteorologist Nick Allard, KIRO 7 News

WEATHER: Storms and fire danger, some haze possible

We have another nice summer day ahead, but there will be a few changes to watch as we head into Wednesday and Thursday.

1 hour ago

seattle e-scooter minivan...

Jason Sutich

Man on electric scooter dies after being struck by minivan in North Seattle

A 37-year-old man died early Tuesday morning after being struck by a minivan while riding an electric scooter.

1 hour ago

ferguson wildfire resources laws...

Jack Bilyeau, KIRO 7

Ferguson to unlock resources for wildfire victims, roll back laws

The state is taking action to help victims of the devastating Old Trails, Autumn Lane, and Fairview fires in and around Spokane, as well as wildfires across the state.

2 hours ago

Denny Way...

Paola Tristan Arruda, KIRO 7 News

Traffic patterns have changed on Denny Way as part of Route 8 project

One of Seattle’s busiest corridors has entered the final phase of a project designed to bring a new bus-only lane to Denny Way.

2 hours ago

shooting seattle...

James Lynch

Triple shooting at party in Seattle short-term rental under investigation

Seattle police are investigating a triple shooting that happened early Monday morning at a party in a short-term rental home in lower Capitol Hill.

12 hours ago

Study: Stressed rats more likely to seek pot