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Frequently Asked Questions About Hair Drug Testing

Whether you are a prospective candidate in the middle of the hiring process or you’ve been with your job for some time, you may be subjected to periodic drug testing by your employer. Depending on the center your company uses for occupational health and drug testing, you may need to submit a sample of your blood, urine, saliva or hair for testing. AFC Urgent Care South Plainfield can analyze and process hair samples in our on-site laboratory.

What is hair drug testing?

Hair testing is the process of looking for traces of drugs in the hair shaft instead of bodily fluids. While certain fluid tests can be altered through abstinence or switching samples, it is virtually impossible to fake the results of a hair drug test. With more accurate and comprehensive results, you’ll be able to make sure your business maintains productivity. Hair can be used from the head or certain areas around the body.

What drugs can be tested for in a hair test?

A hair test can check for the following:

  • Marijuana
  • Cocaine
  • Opiates
  • Alcohol
  • MDMA

How does hair drug testing work?

Approximately one and a half inches of hair is needed to perform a drug test for the past three months because hair grows half an inch per month. The hair will be cut close to the scalp in order to get an accurate sample, and the strand cut will be cut down to the necessary one and a half inches, with the rest kept secure in case further tests are requested. Drugs can be detected in hair between 5-7 days after use, after it grows above the scalp.

What do the results mean?

Depending on whether or not drugs are found in the hair shaft, you may have a positive, negative or inconclusive result.

  • A positive test result is confirmed within 72 hours of the initial test. If you have an inconclusive or positive result, the sample will undergo a second test called GC/MS (gas chromatography/mass spectrometry) in order to confirm the result and determine the drugs present.
  • A negative test result is confirmed within 24 hours using an ELISA test. If your test produces a negative result, it indicates that illicit drugs have not been engaged in the past 90 days.
  • Inconclusive results are uncommon but possible. The test will be repeated or an additional sample will be collected.

Hair Drug Testing in Edison, Piscataway & South Plainfield, NJ

If you need to submit to drug testing for your employer, visit AFC Urgent Care South Plainfield today. We will be able to perform the necessary tests and get the results back to you and your HR departments quickly. For questions, please call 908-222-3500.