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Related Concept Videos

Drug Concentrations: Measurements01:23

Drug Concentrations: Measurements

Drug concentration is the quantity of a drug present in a biological sample. Measuring drug amounts in biological samples allows the clinician to understand how a drug is absorbed, distributed, metabolized, and excreted. Samples can be obtained through invasive or non-invasive methods. Invasive techniques involve surgical or parenteral interventions to gather blood, cerebrospinal fluid, or tissue biopsy. Conversely, non-invasive approaches provide samples like urine, feces, and saliva.
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High-throughput and Comprehensive Drug Surveillance Using Multisegment Injection-Capillary Electrophoresis-Mass Spectrometry
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Workplace drug testing, different matrices different objectives.

Lolita M Tsanaclis1, John F C Wicks, Alice A M Chasin

  • 1Cansford Laboratories Limited, Cardiff Medicentre, Cardiff, UK. loli@cansfordlabs.co.uk

Drug Testing and Analysis
|February 25, 2012
PubMed
Summary
This summary is machine-generated.

Drug testing using hair samples detects more drug use than urine tests over a longer period. Oral fluid testing is promising for detecting current impairment in workplace safety scenarios.

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Area of Science:

  • Forensic Toxicology
  • Occupational Health
  • Analytical Chemistry

Background:

  • Drug testing is crucial for employers to assess employee and candidate drug use.
  • Common screening methods include urine, hair, and oral fluid analysis.
  • Each method offers different detection windows and implications for impairment.

Purpose of the Study:

  • To compare the effectiveness of different drug testing methods.
  • To evaluate the detection capabilities of urine, hair, and oral fluid tests.
  • To determine the optimal method for various workplace screening scenarios.

Main Methods:

  • Analysis of urine samples for recent drug use (detects within days).
  • Hair sample analysis for extended drug use detection (1-3 months).
  • Oral fluid (saliva) testing for current drug use and potential impairment.

Main Results:

  • Hair testing offers a longer detection window and fewer false negatives compared to urine tests.
  • Hair analysis identified twice as many drug users as urine testing in industrial settings.
  • Oral fluid testing shows promise for detecting current use and impairment.

Conclusions:

  • Hair testing is a more reliable indicator of non-drug use due to its extended detection period.
  • Oral fluid testing is valuable for immediate workplace safety assessments (e.g., post-accident).
  • Choosing the appropriate drug testing method is essential for accurate employee screening.