How accurate are mouth swab drug tests?

Answer

According to Forensic Fluids Laboratories, oral swab drug tests are up to 60 percent more sensitive to cocaine, opiates and methamphetamines than urine-based instant tests. This drastically reduces the number of false negative results. Forensic Fluids Laboratories cites a study from the Journal of Analytical Toxicology, which demonstrates that the urine tests produce false-negative results up to twice as often as mouth swab tests.

One key difference between the two types of tests involves detecting THC, the active chemical in marijuana. Forensic Fluids Laboratories reports that mouth swabs are capable of detecting use up to 72 hours after the drug was used. By contrast, urine tests often detect THC in samples up to 120 hours after the drug was used. MedicalHealthTests.com adds that the efficacy of the tests may vary widely, as no certification or consistent protocols are in place to guide the testing process.

MedicalHealthTests.com explains that brushing, flossing and practicing oral hygiene may cause the mouth swab test to generate a false negative. A 2006 study, published in Clinical Biochemist Reviews, found that ingesting alcohol immediately after ingesting marijuana temporarily rinses the mouth and produces false negatives. The study’s authors suggest water may have a similar effect. The authors indicate that testing 15 to 20 minutes after such rinsing produces more accurate results.

Q&A Related to "How accurate are mouth swab drug tests?"
The accuracy of drug testing methods is determined over a documented period of use, with large representative samples and thorough follow-up with test subjects. Oral swabs are a commercial
http://www.ehow.com/facts_7362822_accurate-swabbin...
Mouth swab drug tests work by testing your saliva for the presence of certain drugs. If they are present you have a positive test. This is the easiest of drug tests because it only
http://www.ask.com/web-answers/Health/Other/how_do...
A mouth swab drug test has an accuracy of about 98%
http://www.chacha.com/question/how-accurate-is-a-m...
Very F*ing accurate, better brush the hell out of your entire mouth and drink a gallon of water everyday until you get tested.
http://wiki.answers.com/Q/How_accurate_are_oral_sw...
1 Additional Answer
Ask.com Answer for: How Accurate Are Mouth Swab Drug Tests
How Accurate Is Mouth Swabbing as an Employee Drug Test?
The accuracy of drug tests once depended on proper chain of custody and a competent laboratory. Employers needed a cheaper, easier alternative, and oral swab testing has given them one. The concern is whether oral fluid and on-the-spot testing materials... More »
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