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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]
The study found that "after adjusting for age, gender, race and alcohol use, drivers who tested positive for marijuana were no more likely to crash than those who had not used any drugs or alcohol prior to driving". [3] The study however cautions that "these results do not indicate that drug use by drivers is risk-free."
The Drugwipe device identified 1 exposed driver, but with GC-MS, 18 drivers tested positive. THC concentrations in the Intercept buffer ranged from 2.1 to 205.1 ng/mL. These concentrations represent about 1/2 to 1/3 the authentic THC concentrations in oral fluid because of the dilution by the blue liquid of the device.
The positive THC level was increased from 150 ng/ml (nanograms per milliliter) to 350 ng/ml, per the memo, which was obtained by The Associated Press. Tetrahydrocannabinol is the substance that’s primarily responsible for the effects of marijuana on a person’s mental state.
U.S. long jumper Tara Davis-Woodhall was suspended for one month and stripped of her indoor national title after a positive test for THC, the psychoactive compound found in cannabis.
For instance, Sucrets lozenges tested positive for marijuana. This study concluded that the D–L test is useful only as a "screen" test and was not sufficiently selective to be relied upon for "identification". [3] Still another study, in 1974, showed that 12 of 40 plant oils and extracts studied gave positive D–L test results.
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 detected up to 28 days after consumption. [15] Cocaine: 2 to 5 days (with exceptions for heavy users who can test positive up to 4/6 weeks, and individuals with certain kidney disorders) up to 90 days
A chemical in marijuana, THC, triggers brain cells to release the chemical dopamine. Dopamine creates good feelings — for a short time. Here's the thing: Once dopamine starts flowing, a user feels the urge to smoke marijuana again, and then again, and then again. Repeated use could lead to addiction, and addiction is a brain disease.