Testing for drugs in horses

Jerry W. Blake, Thomas Tobin

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Drug testing today depends primarily on post-race urine testing, with blood testing and pre-race testing as adjuncts to the testing process. Drugs are extracted from urine by a process called liquid-liquid extraction, and then screened for the presence of illegal agents. Screening is generally done by Thin Layer Chromatography (TLC analysis). If a drug is detected in the screening process, its presence in the sample is confirmed by other chromatographic methods, and most especially by Gas Chromatography-mass Spectrometry (GC-MS.) The qualitative detection of drugs in forensic samples is a well worked-out art, and most drugs can be identified in blood or urine samples with a high degree of accuracy. Drugs can be quantitated in blood or urine with an accuracy of plus or minus 25% or more. Thesescientific determinations on a sample can be independently verified in referee samples, and form the scientific basis of the regulatory process of medication control.

Original languageEnglish
Pages (from-to)93-97
Number of pages5
JournalJournal of Equine Veterinary Science
Issue number2
StatePublished - 1986

ASJC Scopus subject areas

  • Equine


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