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  2. Cannabis drug testing - Wikipedia

    en.wikipedia.org/wiki/Cannabis_drug_testing

    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] Urine testing is an immunoassay based test on the principle of competitive binding. Drugs which may be present in the urine specimen ...

  3. How long does marijuana stay in the system? It depends on ...

    www.aol.com/long-does-marijuana-stay-system...

    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.

  4. Drug test - Wikipedia

    en.wikipedia.org/wiki/Drug_test

    2 to 3 days in blood, up to 2 weeks in blood of heavy users [12] However, it depends on whether actual THC or THC metabolites are being tested for, the latter having a much longer detection time than the former. THC (found in marijuana) may only be detectable in saliva/oral fluid for 2 to 24 hours in most cases, though in rare cases has been ...

  5. 11-Nor-9-carboxy-THC - Wikipedia

    en.wikipedia.org/wiki/11-nor-9-Carboxy-THC

    11-COOH-THC is a Schedule 8 prohibited substance in Western Australia under the Poisons Standard (July 2016). [15] A schedule 8 substance is a controlled Drug – Substances which should be available for use but require restriction of manufacture, supply, distribution, possession and use to reduce abuse, misuse and physical or psychological dependence.

  6. Effects of cannabis - Wikipedia

    en.wikipedia.org/wiki/Effects_of_cannabis

    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]

  7. Unlike alcohol, THC impairment is hard to measure — making a ...

    www.aol.com/news/arbitrary-cutoffs-thc-levels...

    Then, THC levels drop rapidly to less than 2 nanograms per milliliter of blood after about four hour. It takes around eight hours to reach similarly low concentrations of THC after taking an edible.

  8. 11-Hydroxy-THC - Wikipedia

    en.wikipedia.org/wiki/11-Hydroxy-THC

    Like Δ 9-THC, 11-hydroxy-THC is a partial agonist at the cannabinoid receptor CB 1, but with significantly higher binding affinity (K i = 0.37 nM compared to Δ 9-THC K i = 35 nM). [7] With respect to cAMP inhibition at CB 1 it displays a similar efficacy to that of Δ 9 -THC (EC 50 = 11 nM vs. EC 50 = 5.2 nM, respectively), but a lower ...

  9. Presumptive and confirmatory tests - Wikipedia

    en.wikipedia.org/wiki/Presumptive_and...

    For example, the Kastle–Meyer test will show either that a sample is not blood or that the sample is probably blood, but may be a less common substance. Further chemical tests are needed to prove that the substance is blood. Confirmatory tests are the tests required to confirm the analysis. Confirmatory tests cost more than simpler ...