--- title: "how long does amphetamines stay in blood" description: "How long does amphetamines stay in blood? Detection window varies, tested through certified labs with MRO review. Call (877) 731-6362 for detailed info." author: "AMH Nationwide" date: "2026-08-28" tags: ["how long does amphetamines stay in blood"] canonical: "https://amhnationwide.com/how-long-does-amphetamines-stay-in-blood/" last_updated: "2026-08-31" --- # how long does amphetamines stay in blood **By AMH Nationwide** | August 28, 2026 How long does amphetamines stay in blood? Detection window varies, tested through certified labs with MRO review. Call (877) 731-6362 for detailed info. --- How long does amphetamines stay in blood depends on several factors including dosage, metabolism, and testing sensitivity. Typically, amphetamines are detectable in blood for 12 to 48 hours after use. AMH Nationwide uses five national lab networks with certified Medical Review Officers to ensure accurate results. Call (877) 731-6362. TEST OVERVIEW ## How long does amphetamines stay in blood after use? Amphetamines generally remain detectable in blood for about 12 to 48 hours following consumption. This [detection window](https://amhnationwide.com/hair-follicle-drug-test-detection-window/) reflects the period during which active drug molecules circulate in the bloodstream before being metabolized and excreted. The precise timeframe varies based on individual metabolism rates, dosage amount, frequency of use, and the sensitivity of the blood drug test employed. Blood tests target parent compounds and some metabolites, which decline rapidly compared to [urine](https://amhnationwide.com/urine-drug-testing/) or hair samples. Testing labs typically apply cutoffs aligned with [SAMHSA](https://www.samhsa.gov/workplace/drug-testing) or DOT guidelines. For example, a common laboratory cutoff for amphetamines in blood is 5 ng/mL, below which the test is considered negative. AMH Nationwide coordinates testing through five national laboratories—[Quest Diagnostics](https://www.questdiagnostics.com/), [LabCorp](https://www.labcorp.com/), Omega Labs, United States Drug Testing Labs, and ExperTox—to provide consistent and reliable amphetamines detection in blood samples. COLLECTION PROCESS ## What is the collection process for amphetamines blood testing? The collection process starts when the test requester contacts AMH Nationwide to schedule a blood draw at one of over 20,000 nationwide collection sites. AMH provides the laboratory order and directs the individual to the collection location; there is no online test ordering. At the collection site, a trained phlebotomist draws a blood sample using sterile techniques. The sample is then labeled and shipped under chain-of-custody protocols to one of the five national labs for analysis. This strict chain of custody ensures sample integrity and legal defensibility, which is critical for employer, court, or compliance testing scenarios. The blood specimen is typically processed within 24 to 48 hours after collection. LABORATORY ANALYSIS ## How do labs detect amphetamines in blood samples? Laboratories use advanced analytical techniques such as Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS) or Gas Chromatography-Mass Spectrometry (GC-MS) to detect amphetamines in blood. These methods provide high specificity and sensitivity, essential for accurate identification and quantification. The testing targets both amphetamine and methamphetamine, along with potential metabolites. The SAMHSA and DOT-regulated laboratories follow strict cutoff levels, commonly 5 ng/mL, to differentiate between negative and positive results. Testing is performed under CLIA certification and CAP accreditation, ensuring compliance with federal and industry standards. AMH Nationwide’s use of multiple national labs offers redundancy and consistency in test outcomes. RESULT REVIEW ## How are blood test results for amphetamines validated? After initial screening and confirmation, all non-negative blood drug test results undergo review by a certified Medical Review Officer (MRO). The MRO assesses medical history, prescription use, and other relevant information to verify result validity. This step reduces false positives and ensures that legitimate prescription amphetamines are distinguished from illicit use. The MRO also provides a final report to the test requester, explaining findings clearly. AMH Nationwide integrates MRO review as a standard part of amphetamine blood testing to uphold accuracy and legal defensibility, consistent with SAMHSA and DOT requirements. ## Request Accurate Amphetamines Blood Testing To arrange amphetamines blood testing through AMH Nationwide, call (877) 731-6362. Our lab order process and extensive network guarantee precise detection aligned with regulatory standards. [Call (877) 731-6362](tel:+18777316362)[Contact Us](https://amhnationwide.com/contact-us/) FACTORS AFFECTING DETECTION ## What factors influence how long amphetamines stay in blood? Multiple variables impact the detection window of amphetamines in blood: – Dosage and frequency: Larger or repeated doses prolong detection time. – Metabolism: Faster metabolic rates clear the drug more quickly. – Body mass and hydration: These affect drug distribution and clearance. – Time elapsed since last use: The longer the interval, the lower the blood concentration. – Testing sensitivity: Lower cutoff thresholds detect smaller amounts, extending apparent detection time. Understanding these factors helps interpret test results accurately in employment or legal contexts. COMPARISON ## How does blood testing for amphetamines compare to other specimen types? Blood testing detects amphetamines for a short period, typically 12 to 48 hours, making it effective for identifying recent use. By contrast, urine tests detect amphetamines for 1 to 3 days, offering a longer detection window but less immediacy. Hair testing can reveal amphetamine use over months but does not indicate current impairment or recent ingestion. The choice of specimen depends on testing goals: blood tests provide accurate, immediate detection, especially critical in safety-sensitive workplaces or legal cases. AMH Nationwide routes blood specimens through accredited labs with established protocols, ensuring reliable detection consistent with regulatory standards. | Specimen Type | Detection Window | | --- | --- | | Blood | 12 to 48 hours | | Urine | 1 to 3 days | | Hair | Up to 90 days | Employers and courts select blood testing when recent drug use confirmation is required. AMH Reviewed & Maintained By 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 You May Also Need [Nail Drug TestingNo head or body hair available? A 5-panel fingernail test covers a similar look-back window.Learn more →](https://amhnationwide.com/5-panel-fingernail-drug-test/)[ChildGuard: Environmental ExposureConcerned about a child or loved one? ChildGuard screens for exposure to drugs in their environment.Learn more →](https://amhnationwide.com/5-panel-hair-drug-test-environmental-exposure-childguard/)[Shorten the Detection WindowShortened options like 30 and 60 day hair panels are also available, useful when a urine test’s 1-3 day window is too short.Learn more →](https://amhnationwide.com/30-day-hair-drug-test/)[Hair ETG Alcohol TestAlso need alcohol testing? The hair ETG test screens for alcohol use, and can be added to the same collection.Learn more →](https://amhnationwide.com/etg-and-peth/) Frequently Asked Questions ## Common Questions Amphetamines are rarely detectable in blood beyond 48 hours due to rapid metabolism and excretion. Detection depends on amount consumed and individual metabolism, but generally, blood tests are limited to recent use. Yes, prescribed amphetamines can produce positive blood test results. The MRO reviews prescriptions and medical history to differentiate legitimate use from illicit consumption. Blood tests provide more immediate detection and precise concentration levels, making them suitable for confirming recent use. Urine tests cover a longer detection window but with less specificity regarding timing. For optimal detection, blood should be collected within 12 to 48 hours after use, before the drug concentration falls below the laboratory cutoff levels. AMH Nationwide routes samples through five national lab networks: Quest Diagnostics, LabCorp, Omega Labs, United States Drug Testing Labs, and ExperTox, all CAP and CLIA accredited. AMH Nationwide does not offer online ordering. Test requests require contacting AMH directly at (877) 731-6362 to initiate the lab order and schedule collection. Sources • [SAMHSA – Mandatory Guidelines for Federal Workplace Drug Testing Programs](https://www.samhsa.gov/workplace/drug-testing) • [U.S. DOT – 49 CFR Part 40 – Procedures for Transportation Workplace Drug and Alcohol Testing Programs](https://www.transportation.gov/odapc/part40) • [CDC – National Center for Health Statistics – Drug Use FastStats](https://www.cdc.gov/nchs/fastats/drug-use.htm) • [Quest Diagnostics – Employer Solutions, Hair Testing Methodology](https://www.questdiagnostics.com/) • [LabCorp – Occupational Testing Services](https://www.labcorp.com/) ## 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. [Call (877) 731-6362](tel:+18777316362)[Contact Us](https://amhnationwide.com/contact-us/) --- **Need a drug, alcohol, HIV or STD test?** AMH Nationwide is a national lab testing agency operating since 2004, with more than 20,000 collection sites across the United States. Hair, urine, fingernail and blood testing, panels from 5 through 19, for individuals and employers. - Call: (877) 731-6377 - Find a collection site: https://amhnationwide.com/locations/ - Full page: https://amhnationwide.com/how-long-does-amphetamines-stay-in-blood/