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Updated: Jun 15, 2026
10:17
High-throughput and Comprehensive Drug Surveillance Using Multisegment Injection-Capillary Electrophoresis-Mass Spectrometry
Published on: April 23, 2019
Urine drug screening: a valuable office procedure.
John B Standridge1, Stephen M Adams, Alexander P Zotos
1Health Science Center, University of Tennessee College of Medicine, 1100 E. 3rd Street, Chattanooga, TN 37403, USA.
American Family Physician
|March 2, 2010
Summary
Urine drug screening aids workplace safety and monitors medication compliance. Understanding test methods, detection windows, and false results is crucial for accurate interpretation.
Area of Science:
- Clinical Chemistry
- Forensic Toxicology
Background:
- Urine drug screening is vital for workplace safety, medication compliance, and detecting substance abuse.
- Accurate interpretation requires knowledge of testing modalities, drug detection times, and potential false results.
Purpose of the Study:
- To provide a comprehensive overview of urine drug screening.
- To discuss the applications, methodologies, and interpretation of urine drug tests.
Main Methods:
- Overview of standard immunoassay testing as the initial screening method.
- Discussion of confirmatory testing techniques like gas chromatography/mass spectrometry (GC/MS) and high-performance liquid chromatography (HPLC).
- Emphasis on understanding drug detection windows and factors influencing false-positive/false-negative results.
Main Results:
- Immunoassays reliably detect some opioids (morphine, codeine, heroin) but often miss others (e.g., oxycodone, fentanyl).
- Confirmatory testing is essential for unexpected positive results.
- Detection times vary, with marijuana having a longer detection window.
Conclusions:
- Urine drug screening is a valuable tool when tests are correctly ordered and interpreted.
- Awareness of assay limitations and confirmation methods is key to reliable results.
- Proper urine collection protocols can help mitigate attempts to falsify results.
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