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Drug Metabolites and
Hair Testing
Robert M. White, Sr., Ph.D., DABCC, F-ABFT
Rockville, Maryland
March 20, 2017
Urine Drug/Drug Metabolite
Testing
? Current urine drug testing under the DHHS Mandatory Guidelines allows testing for Cannabinoids, Cocaine Metabolite, Amphetamines, Opiates, and PCP and Specimen Validity Testing or SVT.
? Numerous other drugs and drug metabolites.
? Whether a parent drug and/or a metabolite is
present, a urine positive shows use.
3
Urine Specimen - Filtered Blood
By Madhero88 - Own workReferenceshere, CC BY 3.0, /w/i ndex.p hp?curid=9665603
4
Hair Drug Testing
? Hair, as harvested for testing, was removed from completely outside the body.
? Currently, most testing for drugs of abuse in hair is performed by targeting parent drugs except for the major metabolite of 9tetrahydrocannabinol ("THC"), 11-nor-9tetrahydrocannabinol-9-carboxylic acid or THCA (Carboxy-THC, THCCOOH).
? Major Issue: External contamination by drugs.
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