When it comes to drug testing, one very important consideration is the drug testing cut-off level. This is the level, the pre-determined threshold or breakpoint, which determines whether a drug test is positive or negative.
Drug concentration is expressed in nanograms (ng) per milliliters (mL), commonly abbreviated as ng/mL. A nanogram is a very small amount – it is actually one billionth of a gram. 1 mL is equal to roughly 1/30 of a fluid ounce.
How Are Cut-Off Levels Decided?
For most drugs of abuse the cut-off levels have been set to enable testing at as low a level as possible, while still keeping the integrity of the test The level that is set makes it possible to optimise the window of detection for the drug or drug metabolite that is being screened for.
What Are the Drug Test Cut-Off Levels for Cocaine?
The cut-off levels for a cocaine drug test will vary, depending on the type of test being used. The most commonly used forms of drug testing in the workplace right now are urine drug testing and saliva drug testing. A saliva drug test will have a much lower cut-off than a urine drug test.
What Are the Urine Drug Test Cut-Off Levels for Cocaine?
A urine drug test for cocaine will detect both Cocaine and its metabolite benzoylecgonine.
The cut-off level on urine drug tests for Cocaine is normally 300 ng/ml. This is the standard cut-off used in the UK and in most workplace drug testing that involves taking a urine drug test.
The cut-off level of 300ng/ml is the same for all of our urine drug test kits. This includes our single drug test kit for cocaine and our multi-parameter drug test kits, including the popular 5 drug, 7 drug and 12 drug test kits. All of our urine drug test kits detect benzoylecgonine.
The window of detection for a urine drug test for cocaine is 3 to 5 days from the last use.
What Are the Saliva Drug Test Cut-Off Levels for Cocaine?
A saliva drug test for cocaine has a lower level cut-off. than a urine drug test. A saliva drug test also has a lower window of detection, which is normally about 24 hours. A saliva drug test for cocaine is recommended in situations where current impairment or very recent drug usage is being monitored.