Marijuana Drug Testing Facts
The standard cutoff levels of marijuana in a Enzyme Multiple Immunoassay Test (EMIT) and Gas Chromatography Mass Spectrometer (GC MS) drug test are 50ng/ml. Some drug tests such as the GC MS can read as accurate as 15ng/ml.
Drug Test Results
Positive: A rose-pink band is visible in each control zone. No color band appearing in the appropriate test zone indicates a positive result for the corresponding drug of that specific test zone.
Negative: A rose-pink band is visible in each control zone and the appropriate test zone, indicating that the concentration of the corresponding drug of that specific test zone is below the detection limit of the test.
Invalid: If a color band is not visible in each of the control zones, the test is invalid. Another test should be run to re-evaluate the specimen.
Marijuana drug tests are the most popular type of test performed for pre-employment and random drug screening today. Marijuana is also the most commonly used illicit drug in the United States. A dry, shredded green/brown mix of flowers, stems, seeds, and leaves of the hemp plant Cannabis sativa, it usually is smoked as a cigarette (joint, nail), or in a pipe (bong). It also is smoked in blunts, which are cigars that have been emptied of tobacco and refilled with marijuana, often in combination with other drugs. The main active chemical in marijuana is THC (delta-9-tetrahydrocannabinol). The membranes of certain nerve cells in the brain contain protein receptors that bind to THC. Once securely in place, THC kicks off a series of cellular reactions that ultimately lead to the high that users experience when they smoke marijuana.
Substances which can cause false positives
Over-the-counter NSAIDS: lbuprofen; Advil, Nuprin, Mediprim, Motrin, Bayer Select Pain Relief Formula, Excedrin IB Caplets, Genpril, Haltran, lbuprin, Midol 200, Pamprin, Trendar Cramp Relief Formula, Cramp End Tablets, Medipren, Rufln, Naproxen, Aleve, Ketoprofen, Orudis KT. Prescription NSAIDS: Anaprox, Tolectin, ifenoprofen, flurbiprofen, oxaprozin, Ansaid, Clinoril, Dolobid, Feldene, Indocin, Lodine, Meclomen, Motrin, Nalfon, Naprosyn, Orudis, Relafen, Voltaren. Over-the-counter allergy preparations, sleep aids and antinausea medications that contain promethazine: Phenergan, Promethegan. Riboflavin (vitamin B2), Dronabinol, Edecrin.
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