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Canada and Cannabis
New rules for flight crew in Canada: https://www.cbc.ca/news/business/tra...abis-1.5164518 Members of the Canadian aviation industry are forbidden from consuming cannabis for at least 28 days before going on duty, according to new rules now in force. Canadian Aviation Regulations require that pilots, cabin crew, and air traffic controllers must have a certain level of "fitness for duty" on the job, Transport Canada said Thursday. That means they cannot use or be "under the influence of any drug that impairs the person's faculties to the extent that aviation safety is affected," the agency said. As such, four weeks is the minimum time required to be free of cannabis before being allowed to work, the aviation regulator said. But the new rules don't preclude airlines or airports from requiring even stricter requirements of their employees. After the government legalized recreational use of cannabis last fall, Transport Canada undertook a review of its policies with regards to impairment. The new rules in keeping with what Department of National Defence and the Royal Canadian Mounted Police have come up with for their workers, and "aligned with the best available science," the agency said. The rules are in place "effective immediately," Transport Canada added. |
Originally Posted by hr2pilot
(Post 10487892)
After the government legalized recreational use of cannabis last fall, Transport Canada undertook a review of its policies with regards to impairment.
The new rules in keeping with what Department of National Defence and the Royal Canadian Mounted Police have come up with for their workers, and "aligned with the best available science," the agency said. The rules are in place "effective immediately," Transport Canada added. For those interested, a medical treatment of the rate of elimination of the active ingredient. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2587336/ This finding may have informed the length of time chosen by the Canadian authorities. and "aligned with the best available science," the agency said. |
Twenty eight days, eh.
Oh my.... In the 1970's and 80's there would have been many days when half the ATC staff in BC would have been working in circumstances nowhere near in compliance with the new regs. |
Does that NIH study imply actual impairment with those levels of that metabolite? WA uses a different test:
For marijuana use in Washington and Colorado, the current limit is 5 nanograms of delta-9-THC per milliliter of blood. If a driver is found with a THC level at or over that limit, they can be arrested and charged without proof of impairment due to another substance. |
In the 1970's and 80's there would have been many days when half the ATC staff in BC would have been working in circumstances nowhere near in compliance with the new regs. |
The cited study shows that it can take 28 days for a large concentration of THC to be eliminated after heavy consumption, especially with a high BMI which results in a slow release from fatty tissues. Thin users with a low THC concentration show below threshold after 5.6 days.
This study does not in any way link impairment to THC levels. Is there any such study out there? |
Thin users with a low THC concentration show below threshold after 5.6 days. |
Originally Posted by RatherBeFlying
(Post 10488172)
The cited study shows that it can take 28 days for a large concentration of THC to be eliminated after heavy consumption, especially with a high BMI which results in a slow release from fatty tissues. Thin users with a low THC concentration show below threshold after 5.6 days.
This study does not in any way link impairment to THC levels. Is there any such study out there? |
I can still feel the effects fifty years after I last, ahem, inhaled. Now, what was I saying...?
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Never tried it, never felt the need. Alcohol, cigarettes and sex have proved quite sufficient for my personal contentment. YMMV. ;)
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The authorities are really struggling over how to monitor usage. The 28 day rule does seem daft. The ▵9-THC concentration rapidly decreases to 1-4 ng/mL within 3-4 hour after smoking and this seems to relate to lack of clinical symptoms that might cause incapacitation. However if you eat it, the drug is absorbed in the fat and the effective plasma half life for frequent users is 13 days. In medicine we consider a drug to be ineffective after five half lives which is 65 days, but this is an average and might be 90 days in 5% of the population. Nobody is suggesting one marijuana cupcake makes you high for 3 months sadly but it may give positive toxicology results even though in Canada the pilot would be legal!!!! The paper referred to by T28B measures THCCOOH which is an inactive metabolite.
The rule will be 28 days because as often happens the rules are made by the regulator and dont need any scientific basis nor common sense, but the forensic toxicologists and lawyers may well grow rich on the court cases.... |
Originally Posted by MPN11
(Post 10488440)
Never tried it, never felt the need. Alcohol, cigarettes and sex have proved quite sufficient for my personal contentment. YMMV. ;)
so??? are we impressed?? on should try it..not like one becomes a raging addict...alcoh and tobacco not any better for you.. |
Originally Posted by ironbutt57
(Post 10488487)
so??? are we impressed?? on should try it..not like one becomes a raging addict...alcoh and tobacco not any better for you..
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Originally Posted by MPN11
(Post 10488528)
Apologies for injecting humo[u]r. Have a nice day.
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good one, thanks pm! :ok:
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I work with a bloke with a heavy habit, swears it doesn't affect him, but I watched a full on 5 minute psychotic breakdown because... somebody had swapped his green plastic file to a red one and he hates red.... but nooooooo it doesn't affect him!
G |
4 weeks is about the longest you will still test positive for after use, however running a full battery of tests on a heavy user can show usage going back even further.
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As others have noted above - being able to detect a tiny amount of a metabolite of a drug does not mean someone is currently experiencing its psychoactive effects.
E.g. it is possible to have urine test positive for opiates, hours after eating food containing poppy seeds - although this is more likely with poppy seed cake (with loads of seeds) than with rolls/bagels (just sprinkled with them). |
Originally Posted by krismiler
(Post 10488701)
4 weeks is about the longest you will still test positive for after use, however running a full battery of tests on a heavy user can show usage going back even further.
I do not have answers to what Intruder and RatherBeFlying asked about. |
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