It is extremely important to understand drug testing cut-off levels when considering the results from drug testing. The cut-off level is a breakpoint or threshold that has been predetermined, which is the measurement that will determine if a drug test has a positive or negative result.
This resulting measurement is expressed as a concentration of nanograms per millilitres (ng/mL). A nanogram is an extremely small amount, one billionth of a gram to be exact, and a millilitre is roughly equal to1/30 amount of fluid.
What Determines Cut-Off Levels?
For the majority of drugs of abuse, cut-off levels have been determined to be at the lowest possible level when being tested, while at the same time maintaining the integrity of the test. By setting the testing level low, it makes the window for optimal detection of screening for drugs, or drug metabolite, as large as possible.
What Are Benzodiazepines Drug Test Cut-Off Levels?
Depending on the test type that is being used, benzodiazepines drug tests will have various cut-off levels. In the workplace at the present time, drug testing for benzodiazepines usually takes on one of two forms; the saliva drug test or a urine drug test. The cut-off level for the saliva drug test is considerably lower than that of the urine drug test.
Benzodiazepines Cut-Off Levels When A Urine Drug Test is Used.
Normally, when a urine drug test is used, 300 ng/ml of benzodiazepines is the cut-off level. Within the UK this cut-off level is the standard, and likewise, when the urine drug test is used in the majority of workplace settings.
All of our urine drug test kits use the same 300 ng/ml cut-off level. This is true of our drug test kits, which only test for benzodiazepines, along with our drug test kits that are multi-parameter. Included in this would be our popular test kits: 12 drug, 7 drug, and 5 drug.
Benzodiazepines have a detection window, when this drug test is used, of 3 to 5 days after the drug was last used.
Benzodiazepines Cut-Off Levels When A Saliva Drug Test is used.
The cut-four off level benzodiazepines is considerably lower for a saliva drug test when compared to a urine drug test. The detection window for the saliva drug test is likewise considerably smaller; normally this detection window is only around 24 hours. It is recommended using the benzodiazepines saliva drug test when the circumstances indicate there may be impairment currently present or when the monitoring of recent drug usage is needed.
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