ANN ARBOR (13abc Action News) - You're urged not to drive after using marijuana, but a division of the University of Michigan says that's not happening.
According to a new study from U of M's addiction center, medical marijuana patients are driving high.
Researchers surveyed about 800 patients and they found more than half said they drove within two hours of using cannabis.
Driving under the influence of marijuana in Michigan is against the law -- even for medical marijuana patients.
Researchers point out there is still no established legal limit for medical marijuana like there is with a blood-alcohol content.