Chronic Pot Smokers Beware: THC Remains in System For Weeks!

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According to a study just released by the American Association of Clinical Chemistry, chronic pot smokers can test positive for residual levels of THC in blood for up to several weeks after abstaining from smoking marijuana. The study is based on findings from 30 daily pot smokers who smoked ten joints per day and then stopped smoking while researchers tested their blood.

"Of the 22 subjects tested 24 hours following admission into the trial, 12 (59 percent) tested positive for THC levels greater than 1ng/ml, but none tested at levels greater than 5ng/ml," the study states. "All of the subjects' THC/blood levels tested below 1ng/ml within seven days following admission."

Despite that, researchers found that the amount of THC in the blood of participants "did not always decrease in a consistent manner" and "one subject continued to test positive for trace levels of THC for a total of 33 days." 

While the results aren't exactly shocking, apparently this is the first medical study to report on THC levels in chronic pot smokers who remained abstinent in a monitored, i.e. controlled environment for such an extended period of time and still tested positive for THC. 

It'll be interesting to see how these findings impact hearings scheduled for April 23 on State Senator Lou Correa's proposed bill, SB289, which would outlaw driving with any detectible amount of marijuana in your blood unless you have an actual doctor's prescription. Already, NORML is fighting the bill because of the possibility that folks who smoked a doobie a few weeks ago could get charged under the new law if they fail a blood test. 

"According to the US National Highway Traffic Safety Administration," NORML points out. "It is difficult to establish a relationship between a person's THC blood or plasma concentration and performance impairing effects . . . It is inadvisable to try and predict effects based on blood THC concentrations alone."

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20 comments
doctordetroitsrudera
doctordetroitsrudera

Fat-soluble substances like THC will persist in an individual depending on that person´s amount of body fat; the more fat you have, the longer it is in your system.

Also, much too small a sample to be taken seriously...

Rodney David Rachal
Rodney David Rachal

anymore useless articles like this and I'm dropping you guys from my facebook

NGCoot
NGCoot

Correa said that he is probably going to drop marijuana from this bill.

Dan Najera
Dan Najera

Duh. This is old news. Everyone knows this.

John Cabello
John Cabello

Hmm, if you smoke 2 joints in the morning and 2 joints at night and two in the meantime... Well, I guess it add's up...

Damion Jones
Damion Jones

This is not new and it certainly is not news. This has been common knowledge for MANY years.

James McCoy
James McCoy

lol 10 joints a day? Even at my highest level of pot smoking, I never smoked ten joints in a day.

Vinnie Newman
Vinnie Newman

This control group was 10 joints a day x 30 days... 300 joints in a month no shit it will be in your system still.

Mike Calvert
Mike Calvert

Duh? I don't think it's just chronic pot smokers. This article is about as useful as an article saying cigarettes cause cancer.

Andy Sebastian Guillen
Andy Sebastian Guillen

You need a larger sample size than 22 people before you can "confirm" anything with science. That being said, yes, water is wet and the sky is blue.

gregdiamond
gregdiamond

I think that this has been already been known for many years, but if they want to claim that this is the first study ever to show this result, fine.  So long as people know about it -- especially those in Lou Correa's office.  (It's possible, to be fair, that the previous studies only dealt with metabolites of cannabis (into which it breaks down in the bloodstream), which as I remember may remain present in the blood for up to two months.)

Essentially, in my opinion presence of drugs in the blood must be required to be actual evidence of potential actual impairment -- presence in sufficient amounts to disturb perception and judgment -- to justify a DUI.  Anything less would violate the Eighth Amendment (cruel and unusual punishment) and especially the Fourteenth Amendment's Due Process Clause.  Democrats, Republicans, and others should all flee from this bill.

Ryan Handy
Ryan Handy

Thank you captain obvious, you saved the day again.

paullucas714
paullucas714 topcommenter

Lou Correa is a jerk on the issue of cannabis. his handlers in the Prison Industrial Complex are pulling his strings so he can send them more cattle to feed their bloated pensions at the expense of the average Californian. This guy needs to be censured.

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