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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 ...
Urine drug test kits are available as on-site tests, or laboratory analysis. Urinalysis is the most common test type and used by federally mandated drug testing programs and is considered the Gold Standard of drug testing. Urine based tests have been upheld in most courts for more than 30 years.
11-COOH-THC has a long half-life in the body of up to several days (or even weeks in very heavy users), [4] [5] [6] making it the main metabolite tested for blood or urine testing for cannabis use.
Delta-9-tetrahydrocannabinol, or THC — the main psychoactive compound in weed that provides the euphoria often associated with cannabis use — can be detected in urine for up to three days ...
Tetrahydrocannabinol, or THC, which is what provides the euphoria associated with cannabis use, can be detected “for up to 2 weeks in the casual user and possibly longer in the chronic user ...
A urine drug screen can be useful for objectively determining the presence of cannabinoids in a person's system. [8] Cannabinoid metabolites (specifically 11-nor-Δ9-carboxylic acid) can be detected in urine for about 2 to 8 days with short-term use, and for 14–42 days of chronic use. [24]
While urine samples were used to determine participants’ recent cannabis use, lifetime cannabis use was defined as: Heavy: 1,000+ times or diagnosis of cannabis dependence Moderate: 10–999 times
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]
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