Cannabis drug testing describes various drug test methodologies for the use of cannabis in medicine, sport, and law. Cannabis use is highly detectable and can be detected by urinalysis, hair analysis, as well as saliva tests for days or weeks. Cannabis can be detected even after a long time of abuse as THC remains in the fatty tissues of the body and enters steadily into the blood and urine. The common methods of cannabis drug testing are-
Urine testing is the common test method as it is least expensive. Urine tests provide results within minutes. However, lab verification is required to get accurate results. They are commonly used at home by parents to track their children and by employers at workplaces to detect their employees. You can also flush weed from your system. Cannabis can be detected by urine drug test for 3 to 5 days and sometimes up to 30 days depending on the amount of cannabis abused. The initial test cutoff concentration is 50ng/mL and confirmatory cutoff concentration level is 15ng/Ml for its metabolite- Delta-9-tetrahydrocannabinol-9-carboxylic acid.
Cannabis abuse can also be detected with hair testing method, which is a little expensive than urine tests. Hair tests require a sample of hair about the diameter of a pencil and 1.5 inches long to detect cannabis abuse. Hair tests can detect cannabis abuse over a longer period for up to 90 days. The initial cutoff concentration in hair is 1.0pg/mg and confirmatory cutoff concentration for cannabis metabolite Delta-9-tetrahydrocannabinol-9-carboxylic acid is 0.05 pg/mg.
Blood tests are the least common methods of testing, as they are very expensive. Cannabis blood tests provide accurate results. The detection period of cannabis in the blood is up to 24 hours and it may be detected for a longer period in a frequent user.
Cannabis is considered as the most commonly abused illicit drug in the United States. Its early detection leads to prevention of cannabis abuse. Therefore, it is very important to know about the drug testing methods, which you can use to detect the presence of cannabis in your dear ones.
Cannabis is detectable by saliva testing. Just like blood testing, saliva testing detects the presence of parent drugs and not their inactive metabolites. This results in a shorter window of detection for cannabis by saliva testing. Delta 9 THC is the parent compound. If a saliva sample is tested in a lab, the detection level can be as low as 0.5 ng/mL (up to 72 hours after intake)and if an onsite instant saliva drug test is used, the cut off level is generally 50 ng/mL (up to 12 hours after intake). Per National Institute on Drug Abuse saliva drug testing provides a reasonable alternative to other drug testing methods.
Beam’s CBD Test:
In 1911, Dr. W. Beam discovered that the tissue of hemp, which is typically low in THC but high in CBD, gives a purple color when treated with bases. The test is relatively simple and inexpensive, and typically involves placing the test sample in a solution of 5% potassium hydroxide and 95% ethanol. After approximately ten minutes, samples with CBD exhibit a violet/purple/pink color. The test is specific to CBD and does not react to THC.
Though very unlikely to be used and more unlikely in court, Electroencephalography or EEG shows somewhat more persistent alpha waves of slightly lower frequency than usual. Cannabinoids produce a “marked depression of motor activity” via activation of neuronal cannabinoid receptors belonging to the CB1 subtype.