Unless otherwise specified, Driving lesson plan pdf publications and videos are available for your use and may be reproduced in their entirety without permission from NIDA. Department of Health and Human Services. Does marijuana use affect driving? Marijuana significantly impairs judgment, motor coordination, and reaction time, and studies have found a direct relationship between blood THC concentration and impaired driving ability.
Marijuana is the illicit drug most frequently found in the blood of drivers who have been involved in vehicle crashes, including fatal ones. Two large European studies found that drivers with THC in their blood were roughly twice as likely to be culpable for a fatal crash than drivers who had not used drugs or alcohol. However, the role played by marijuana in crashes is often unclear because it can be detected in body fluids for days or even weeks after intoxication and because people frequently combine it with alcohol. Those involved in vehicle crashes with THC in their blood, particularly higher levels, are three to seven times more likely to be responsible for the incident than drivers who had not used drugs or alcohol. The risk associated with marijuana in combination with alcohol appears to be greater than that for either drug by itself. However, a large case-control study conducted by the National Highway Traffic Safety Administration found no significant increased crash risk attributable to cannabis after controlling for drivers’ age, gender, race, and presence of alcohol.
What is the scope of marijuana use in the United States? How does marijuana produce its effects? What are marijuana’s long-term effects on the brain? Is marijuana a gateway drug? How does marijuana use affect school, work, and social life? Is there a link between marijuana use and psychiatric disorders? What are marijuana’s effects on lung health?
What are marijuana’s effects on other aspects of physical health? Is marijuana safe and effective as medicine? What are the effects of secondhand exposure to marijuana smoke? Can marijuana use during and after pregnancy harm the baby? Where can I get further information about marijuana? National Institute on Drug Abuse website.
This series of reports simplifies the science of research findings for the educated lay public, legislators, educational groups, and practitioners. The series reports on research findings of national interest. Drugged driving puts the driver, passengers, and others who share the road at risk. Why is drugged driving dangerous?
The effects of specific drugs differ depending on how they act in the brain. For example, marijuana can slow reaction time, impair judgment of time and distance, and decrease coordination. Drivers who have used cocaine or methamphetamine can be aggressive and reckless when driving. Certain kinds of sedatives, called benzodiazepines, can cause dizziness and drowsiness. All of these impairments can lead to vehicle crashes.
Research studies have shown negative effects of marijuana on drivers, including an increase in lane weaving, poor reaction time, and altered attention to the road. Use of alcohol with marijuana made drivers more impaired, causing even more lane weaving. It is difficult to determine how specific drugs affect driving because people tend to mix various substances, including alcohol. But we do know that even small amounts of some drugs can have a measurable effect. As a result, some states have zero-tolerance laws for drugged driving. It’s important to note that many states are waiting for research to better define blood levels that indicate impairment, such as those they use with alcohol. Illicit” refers to use of illegal drugs, including marijuana according to federal law, and misuse of prescription drugs.
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How many people take drugs and drive? 7 million people aged 16 or older drove under the influence of alcohol in the past year and 11. 8 million drove under the influence of illicit drugs. NSDUH findings also show that men are more likely than women to drive under the influence of drugs or alcohol.
And a higher percentage of young adults aged 18 to 25 drive after taking drugs or drinking than do adults 26 or older. Photo of a car crash scene with police, in which one of the cars is turned upside down. Which drugs are linked to drugged driving? After alcohol, marijuana is the drug most often found in the blood of drivers involved in crashes. But the role that marijuana plays in crashes is often unclear. THC can be detected in body fluids for days or even weeks after use, and it is often combined with alcohol. The risk associated with marijuana in combination with alcohol, cocaine, or benzodiazepines appears to be greater than that for either drug by itself.