Cite this article

NIDA. (2012, July 11). FACT: Driving After Using Marijuana Is Dangerous. Retrieved from

press ctrl+c to copy
Sara Bellum
July 11 2012

According to a recent driving study, as many as 1 in 5 teen drivers say they drove under the influence of marijuana. More than one-third of them did not believe that marijuana affected their driving, whereas less than one-fifth of teens who drove after drinking alcohol said their driving wasn’t impaired.

These numbers show that some teen drivers aren’t getting the message that both alcohol and drugs—including marijuana—are dangerous risks behind the wheel. Not only that, but drivers under the influence of these substances endanger other users of the road as well.

Reducing drunk driving has been a focus of public health campaigns in the United States for a long time. After all, SADD, which now stands for Students Against Destructive Decisions, started out as Students Against Drunk Driving. Only recently have people started talking about how driving high or buzzed is just as risky as driving drunk.

Your Brain in the Driver’s Seat

Because driving is such a common activity, it’s easy to forget how you really must stay alert to stay safe. While it may seem like your body goes on automatic when accelerating or changing lanes, really your brain is in high gear.

Drugs and alcohol interfere with the brain’s ability to function properly. THC, the main active ingredient in marijuana, affects areas of the brain that control the body’s movements, balance, coordination, memory, and judgment, so it’s no surprise that marijuana and driving don’t mix.

Speak Up

The driving study mentioned above also found that 90 percent of teen drivers would stop driving under the influence of marijuana if asked by their passengers. If you see someone who’s about to drive after using marijuana, tell them it’s not a good idea.

Note: Drugs and alcohol aren’t the only things that may mess with your driving skills—check out to find out about how eating, using a GPS, texting, or talking to passengers can also lead to an accident.

Update: Researchers now have a “driving simulator” that shows exactly how using marijuana can affect driving ability. Read about what they discovered here.