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Laboratoire National de Santé
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Last updated 02.09.2026

  • LNS >
  • Medicines, alcohol and toxicology

Medicines, alcohol and toxicology

Detecting and measuring substances such as alcohol, medicines or drugs in the body.

  • Testing for alcohol biomarkers in blood:
    Analysis of phosphatidylethanol (PEth), an alcohol biomarker with an intermediate half-life, in whole blood. This test is used to monitor alcohol abstinence or drinking patterns in contexts such as restoration of a driving licence, assessment for organ transplantation and detoxification in cases of alcohol dependence.
  • Hair toxicology analysis:
    Detection of psychoactive substances, medicines or alcohol markers in connection with the issue, retention or renewal of a driving licence, offences committed under the influence of drugs and/or legal custody proceedings.
  • Medical toxicology, addiction medicine and pharmacology:
    Analyses used for therapeutic drug monitoring, particularly for medicines with a narrow therapeutic index, in order to adjust doses and ensure efficacy and safety. The analyses can measure medicines, metabolites and toxic substances, as well as detect drugs. Certain markers are used to identify and monitor chronic alcohol and cigarette consumption.
Laboratoire National de Santé

1, rue Louis Rech
L-3555 Dudelange

(+352) 28 100-1

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  • I am a patient
    • What do we do?
    • Your rights as a patient
    • Our educational resources
    • Appointment booking
    • FAQ – Patients and the general public
  • I am a healthcare professional
    • Our Scientific Departments
    • Our Analysis Catalog
    • Patient results
      • Transmission of test results
      • Creation of a regibox access for healthcare professionals
    • Professional platform
    • Healthcare Professionals FAQ
    • Information and Contacts
  • About the LNS
    • Our institution
      • Our History
      • Key Figures
      • Quality Approach
      • Commitments
      • Annual reports
    • Organisation and governance
      • Organisational Chart
      • Governance bodies
      • Direction – Our Management Team
      • Scientific Departments
      • Administrative and Financial Department
      • Support Functions
    • Purpose, Strategy and Activities
      • Missions
      • Expertise
      • National initiatives
      • Research Projects
      • Our main partners
      • Education and awareness
  • Careers
    • Why Join the LNS?
    • LNS Career Focus
    • Our vacancies
    • Careers FAQ
  • Dive into our latest news
    • Newsroom
    • Press Office
    • Events
    • Publications
  • Informations and Contacts
  • FR
  • EN

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