nikka we talking about driving.
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.
6,
7 Marijuana is the illicit drug most frequently found in the blood of drivers who have been involved in accidents, including fatal ones
8 (although it is important to note that marijuana can remain detectable in body fluids for days or even weeks after acute intoxication). A meta-analysis of multiple studies found that the risk of being involved in an accident roughly doubles after marijuana use.
9
Accident-involved drivers with THC in their blood, particularly higher levels, are three to seven times more likely to be responsible for the accident 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.
Smoke and Mirrors: Driving While High on Marijuana Doubles One s Chances of a Serious Car Crash
ooze is behind an estimated 2.1 million car accidents each year in the U.S.—which
cause almost 11,000 traffic fatalities annually. But many drug users have claimed that a few puffs of pot before getting behind the wheel are perfectly harmless. A new study, however, shows that drivers who smoke marijuana within a few hours of hitting the road are almost twice as likely as stone-sober motorists to be in a crash that results in serious injury or death.
Authors of the new paper, published online Thursday in the
British Medical Journal(
BMJ), sifted through nine previous studies to develop a clearer picture of the risks to users who light up before revving up. Previous studies have left the effects of
marijuana on its own—when not combined with alcohol or other drugs—
a little hazy.
But the researchers' findings make sense to others in the field. "Their results are consistent with experimental evidence that cannabis use leads to dose related impairments in simulated driving, psychomotor skills and on-road driving," Wayne Hall, of the University of Queensland's Center for Clinical Research who was not involved in the new research, wrote in a related essay in
BMJ.
In addition to the finding that drivers who had recently smoked pot were substantially more likely to be involved in a serious accident, the researchers found that those who had died in these crashes had higher amounts of the
drug's compoundtetrahydrocannabinol than those who survived. But there was not enough data to link concentrations of the compound to various outcomes in order to suggest a threshold for dangerous intoxication, noted the researchers, who were led by Mark Asbridge, of Dalhousie University's Department of Community Health and Epidemiology.