![]() The laboratory responsible for testing will deliver the results to the individual or organization requesting the test. In some cases, improper collection of the hair specimen may result in the test being rejected completely. This test also identifies the specific drugs used.Īn inconclusive result isn’t common when testing procedures are followed. All nonnegative tests undergo a second test, called gas chromatography/mass spectrometry (GC/MS). Additional testing is required to confirm a positive result.Ī positive drug test is confirmed after 72 hours. This test determines if the hair sample is negative for drug use.Ī negative result indicates that you haven’t engaged in illicit drug use over the past 90 days. A test called ELISA is used as a screening test. ![]() Some research also indicates that hair drug testing can be useful for monitoring drug use in at-risk individuals when used alongside self-reporting.Ī negative result can be determined within 24 hours of hair removal. Your workplace may request a hair test to screen for illicit drug use before hire or randomly during employment. ![]() While a urine drug screen can detect if you’ve used drugs in the last few days, a hair drug test can detect drug use in the past 90 days. opioids (codeine, morphine, 6-acetylmorphine).The sample is then analyzed for signs of drug use during the 90 days preceding the test. Though it’s common to refer to this as a “hair follicle test,” a hair strand drug test only tests clipped strands of hair, not the follicle located under the scalp.ĭuring this test, a small amount of hair is removed from your head using scissors. A hair strand drug test, also known as a hair drug test, screens for illicit drug use and the misuse of prescription medication.
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