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Here's how long after smoking they can detect cannabis in your body, according to Medical News Today: Urine tests: One to 30 days after use Saliva tests: Usually within 24 hours but could detect ...
A marijuana high lasts only a few hours, but traces of tetrahydrocannabinol, or THC, remain in the body for much longer than that.
The 4/20 holiday is this weekend, and if you choose to celebrate, please do so safely. But also, be wary of coming drug tests. How long does marijuana stay in the system?
THC, the main psychoactive component of cannabis, may only be detectable in saliva and oral fluid for 2–24 hours in most cases. [8] [9] The main metabolite excreted in the urine is 11-Nor-9-carboxy-THC, also known as THC-COOH. Most cannabis drug tests yield a positive result when the concentration of THC-COOH in urine exceeds 50 ng/mL. [10]
The THC molecule, and related compounds, are usually detectable in drug tests from 3 days up to 10 days. [citation needed] Long-term users can produce positive tests for two to three months after ceasing cannabis use (see drug test). [17]
Those with THC in their system are from three to seven times more likely to be the cause of the accident than those who had not used either cannabis or alcohol, although its role is not necessarily causal because THC stays in the bloodstream for days to weeks after intoxication. [54] [55] [c]
[clarify] It has been shown that the primary active component of cannabis, Δ9-THC, is converted to the more psychoactive 11-hydroxy-THC by the liver. [11] Titration to the desired effect by ingestion is more difficult than through inhalation, due to the long onset time for the effects. [12]
Because marijuana stays in your system long past the window of cognitive impairment, the potential for false arrests is an increasing concern in states where cannabis is legal.