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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]
Cannabis. Two main questions arise in the law surrounding driving after having ingested cannabis: (1) whether cannabis actually impairs driving ability, and (2) whether the common practice of testing for THC (the main psychoactive substance in cannabis) is a reliable means to measure impairment. On the first question, studies are mixed.
As an example the SAMHSA cutoffs for cannabinoids are 50 ng/ml for the immunoassay and 15 ng/ml as confirmed by GC/MS. Immunoassays that do not conform with SAMHSA, featuring a cutoff of 20 ng/ml, have been shown to produce false positives from passive inhalation of marijuana smoke.
A dried cannabis flower. The effects of cannabis are caused by chemical compounds in the cannabis plant, including 113 [clarification needed] different cannabinoids such as tetrahydrocannabinol (THC) and 120 terpenes, [1] which allow its drug to have various psychological and physiological effects on the human body.
Urine (ng/ml) Blood (ng/ml) Prohibited substance (a) Amphetamine 500 100 (b) Cocaine 150 50 (c) Cocaine metabolite 150 50 (d) Heroin 2,000 50 (e) Heroin metabolite: (1) Morphine 2,000 50 (2) 6-monoacetyl morphine 10 10 (f) Lysergic acid diethylamide 25 10 (g) Marijuana 10 2 (h) Marijuana metabolite 15 5 (i) Methamphetamine 500 100 (j ...
In a statement, USADA wrote that Davis-Woodhall's sample "tested positive for 11-nor-9-carboxy-tetrahydrocannabinol (Carboxy-THC) ... above the urinary Decision Limit of 180 ng/mL/."
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.
A drug test showed that he had 17.8 ng/mL of THC metabolite in his system, slightly higher than the 15 ng/mL threshold used by the International Ski Federation. The IOC executive board voted 3–2 to disqualify him from competition on February 11, 1998, which the Canadian Olympic Association immediately appealed.