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5-Panel Hair Follicle Drug Test: Detection Window | AMH Nationwide

Understanding the 5-Panel Hair Follicle Drug Test Detection Window Benefits

The 5-panel hair follicle drug test detection window typically spans up to 90 days, making it effective for identifying past drug use. This test analyzes hair samples to detect five common drug classes over an extended period. Factors like hair length and growth rate affect detection. Call (877) 731-6362 for testing details.

OVERVIEW

What is the detection window for a 5-panel hair follicle drug test?

The 5-panel hair follicle drug test detection window generally covers up to 90 days of drug use history. This test detects five drug classes by analyzing a small hair sample, typically from the scalp. Because hair grows about half an inch per month, a 1.5-inch hair sample reflects approximately three months of drug exposure.

SCIENCE

How does the 5-panel hair follicle drug test detect drugs over this period?

Drugs and their metabolites enter the hair follicle from the bloodstream during hair formation. As hair grows, these substances become trapped in the hair shaft, allowing detection long after the drug use occurred. The test targets specific drug metabolites incorporated into the hair, providing a timeline of drug exposure.

Hair growth rate: approximately 0.5 inches per month
Standard sample length: 1.5 inches, representing 90 days
Analyzes drug metabolites embedded in hair shaft
DRUGS TESTED

Which drugs are included in the 5-panel hair follicle drug test?

This test detects five common drug classes: amphetamines, cocaine, marijuana (THC), opiates, and phencyclidine (PCP). Each drug class is identified by its unique metabolites in the hair sample. The test is useful for employers and agencies needing a long-term drug use history.

Amphetamines
Cocaine
Marijuana (THC)
Opiates
Phencyclidine (PCP)
FACTORS

What factors can affect the 5-panel hair follicle drug test detection window?

Several factors influence the detection window length for this test. Hair length is critical; shorter hair samples provide a shorter detection period. Hair color and texture may affect drug metabolite incorporation. External factors like chemical treatments can reduce detectable drug levels. Individual hair growth rates and drug usage patterns also impact results.

Hair length: longer hair shows longer detection
Hair color and texture influence metabolite binding
Chemical treatments may degrade drug traces
Individual hair growth rate variability
Frequency and amount of drug use

Need a 5-Panel Hair Follicle Drug Test?

Contact AMH Nationwide to schedule your test at a collection site near you. Call (877) 731-6362 for assistance and detailed information.

PROCESS

How is the 5-panel hair follicle drug test collected and processed?

AMH Nationwide directs clients to collection sites within five national lab networks: Quest Diagnostics, LabCorp, Omega Labs, United States Drug Testing Labs, and ExperTox. A small hair sample is cut close to the scalp, usually about 1.5 inches in length. The sample is sent to the lab for analysis. Non-negative results are reviewed by a certified Medical Review Officer.

LIMITATIONS

Are there limitations to the 5-panel hair follicle drug test detection window?

While this test detects drug use over about 90 days, it cannot detect very recent use within 5 to 7 days, as hair needs time to grow beyond the scalp. Additionally, the test does not detect alcohol or certain synthetic drugs. Detection sensitivity may vary with hair treatments or individual differences.

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AMH Nationwide Customer Service

AMH Nationwide is BBB A+ accredited and routes every order through Quest Diagnostics, LabCorp, Omega Labs, United States Drug Testing Labs, or ExperTox, all of which use multiple lab certification agencies and standards such as SAMHSA-aligned laboratory protocols, the ANSI National Accreditation Board for forensic testing and calibration, the College of American Pathologists (CAP), and Clinical Laboratory Improvement Amendments (CLIA). Every non-negative screen is reviewed by a certified Medical Review Officer as part of standard processing before a result is released, and chain-of-custody documentation is maintained on every collection. This page does not constitute medical or legal advice.

Last updated: July 2026
Frequently Asked Questions

Common Questions

It can detect drug use up to approximately 90 days prior to the test by analyzing hair segments grown during that period.

No, drugs used within 5 to 7 days before the test typically cannot be detected because hair needs time to grow out from the scalp.

Hair color can influence how drug metabolites bind, but labs account for these variations during analysis.

This test covers amphetamines, cocaine, marijuana (THC), opiates, and phencyclidine (PCP).

Yes, bleaching or dyeing hair can reduce the concentration of drug metabolites, potentially affecting detection.

Call (877) 731-6362 to be directed to a collection site within our five national lab networks. AMH provides the lab order and test coordination.

Ready to get started?

AMH Nationwide provides the lab order and arranges collection nationwide. Every non-negative result reviewed by a certified Medical Review Officer. Call (877) 731-6362 or contact us.

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