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Family Physician
Family Physician, Board Certified MRO
Category: Drug Testing
Satisfied Customers: 12816
Experience:  Medical Review Officer - Physician Trained and certified in drug test interpretation
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In a 5 panel hair follicle test, what can be detected with

Resolved Question:

In a 5 panel hair follicle test, what can be detected with this? How long does a person have to abstain from (for example marijauna) to not be detected? What is the best way to clear the system for non detection? FYI: our employee has had limited use of marijuana over the last four months.
Submitted: 5 years ago.
Category: Drug Testing
Expert:  Family Physician replied 5 years ago.
Thank you for your question.

The detection period of hair testing depends on the rate of hair growth and the length of hair used for the actual test. The standard collection method uses a length of hair equal to the average 90 days of growth. Because of minor difference in the rate of hair growth and the collection procedure (how close to the scalp the hair is cut), this may extend by a few weeks.

The standard 5 panel test includes; PCP, cocaine, amphetamine/methamphetamine, opiates (heroin, codeine, morphine), and marijuana. Some panels also include extended opiate panels (oxycodone is often added).

The drugs are incorporated into the hair shaft as the hair grows. Some drugs are incorporated to a higher degree. For this reason, marijuana tests are less sensitive to occasional or single uses than other drugs such as cocaine.
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