10 Most Common Drug Testing Myths

Whenever one intends to have a drug test, some myths and misconceptions are talked about. This great deal of misinformation can be disturbing for those that plan to take a drug test. To remove the confusion, let’s take a look at some of the common myths that apply to both individuals and employers.

Myth #1: Taking A Lot Of Water Makes THC Less Detectable

Even though taking a large quantity of water significantly dilutes the specimen, drug testers are pretty much aware of this trick.

However, we cannot deny the fact that drinking a lot of water does raise a big red flag to drug testers. Rigorous tests are carried out to determine the creatinine levels even though much is thrown off through urine.

Drug testers first determine whether the specimen is too diluted to the extent of providing unreliable test results.

Myth #2: All Drug Tests Involve Urine

Urine is the most commonly usHed sample in drug tests. However, do not be shocked when the drug testers use your hair. Thanks to a German scientist for this great discovery that can go back three months earlier. Of all the tests, this one is the hardest to beat.

The truth, therefore, is that hair and even saliva can be used in the drug test.

Hair Follicle Drug

Myth #3: Second-Hand Smoke Can Falsify Drug Test Results

This is another drug testing myth that goes around. However, the truth is that passive inhalation of smoke cannot bring enough THC into your system to the extent of testing positive.

Do not walk out of the drug testing room when someone walks in and lights up. Unless you are an active smoker, passive inhalation cannot be the reason you register positive during a drug test.

Myth #4: Carrying Out The Second Screen Confirms The Previous Results.

Carrying out the second screen will simply give the same results, especially when the testing techniques are the same. Only definitive methodologies such as GC/MS or LC/MS/MS provide reliable results.

The only sure way to confirm the first results is by using two or more different techniques. The CAP-FDT certification, for instance, uses several techniques to enhance validity and accuracy in test results.

Myth #5: Poppy Seeds Cannot Lead To A False Positive Opiate Result.

Poppy seeds can potentially lead to a false positive result.
This will depend on the cut-off level that is being used by the drug testing facility. A positive opiate result is a possibility when the testing agencies use a lower cut-off level such as 300-ng/ml.

Myth #6: The Drug Level In A Specimen Doesn’t Change Over Time

Metabolites degrade over time but at different rates. THC, LSD, and other drugs are sensitive to light and are wrapped in foil to avoid exposure. Freezing of specimens is the commonly used method that minimizes degradation.

Myth #7: The THC Levels In Consecutive Samples Help In Marijuana Detection

This is not true because of the varying drug concentration levels in consecutive samples. It is, therefore, unreliable to use THC level as the basis for determining the cut-off level.

In order to arrive at a valid conclusion, THC/Creatinine ratios are compared in consecutive samples. If a rise in the rate is detected, then a new marijuana use has likely occurred.

Drug Tests

Myth #8: Drug Testers Prefer Using Urine Because Of The Simplicity And Cost-Effectiveness Associated With The Process And Not Because It Is Accurate.

The fact that urine drug test is the simple and affordable method is undeniable. However, claims that the test isn’t accurate are baseless. Urine has the highest concentration of drugs than hair, saliva and other body fluids. Therefore, urine drug tests are cheap yes, but extremely accurate.

Myth #9: Marijuana Remains In The User’s System For Months Or Years.

This is the most common myth that we have heard around since we were kids. People claim that once marijuana finds a way into your system, getting out isn’t that simple; it may take years.

However, scientific research shows that a chronic user would only test positive for drugs in less than 7 days after the last smoking incidence. However, this can take about 10-21 days under very extraordinary circumstances. On the other hand, occasional users would only test positive 3-7 days after their smoking episode.

Myth #10: Urine And Saliva Provide Same Results

Urine and saliva drug tests are both valid methodologies but exhibit some biological differences. For instance, drugs remain in urine for longer and at a higher concentration than oral fluids.

Urine and saliva taken from a specimen at the same time will have different concentrations. This means one would test negative while the other comes out as positive depending on the cut-off level used.

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