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Peth Alcohol Test (3 week look back)

Our Peth Alcohol Test (3 week look back) looks for direct biomarkers of alcohol that remain in the blood stream for up to 3 weeks after consumption. A peth test detects binge drinking or chronic alcohol use. This test is often ordered by courts, families, or clinicians concerned about a person staying sober over a period of time.

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By Joseph LoRe on August 18, 2016
Northeast Sweepers
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Peth Alcohol Test (3 week look back)

Peth Alcohol Test

What is the purpose of a Peth Alcohol Test?

When someone consumes alcohol (ethanol), the body creates something called phosphatidylethanol (“peth”). Once the alcohol is gone, peth remains in the bloodstream. Depending on how much was drank, this metabolite stays in the blood for about 3 weeks. The more that is consumed, the longer it can be detected.

Who should order this test and why?

Peth tests should be ordered to check if someone has had binges or daily alcohol use in the past 3 weeks. Peth tests do not pick up light or casual drinking; if someone has had a couple drinks on a few occasions in the past few weeks, the Peth test is likely to come back negative. It should also be noted that body weight, metabolism, the number of drinks, and the severity of the binges all affect how long Peth can be detected. In some cases, it can last as long as 4 weeks.

How does scheduling work?

Once the test is booked and paid for, either online or over the phone, you’ll receive a registration code that can be used at the nearest clinic to the city, state and/or ZIP code you choose. The person being tested can then walk-in to the clinic with their photo ID and the registration code.

When and how will I get my results?

Peth tests take a little bit longer to get back results than our typical drug tests. Normally, it takes up to 2 weeks to get results of this test, and occasionally even longer. We will send you your results, signed by a medical review officer, via email, once they are ready. Results will simply indicate “positive” or “negative”. Expect approximately one week to get results. (If the screen is not negative, we will subject the specimen to a confirmation test, which can take a few extra days). All results are reviewed by a Medical Review Officer – a physician.

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