Toxicology / Drugs of Abuse

GML performs drugs-of-abuse urine (DAU) screening, including pre-employment testing, random testing and "for cause" testing. Tests available include a variety of DAU panels as well as individual tests. We offer forensic DAU testing for:

Testing is performed using enzyme multiplied immunoassay technique (EMIT), and positive results are confirmed by the most specific and sensitive method available, gas chromatography/mass spectrometry (GC/MS). Positive samples are retained for a full year or longer, depending on the client's needs. Negative specimens are retained for one month. Written results are provided directly to medical review officers (MROs), with strict confidentiality maintained at all times. GML will assist clients in obtaining MRO services as required. GML is certified by the Pennsylvania Bureau of Laboratories and the College of American Pathologists (CAP) Toxicology Laboratories for the screening and confirmation of forensic drugs of abuse testing, forensic blood alcohol levels, and lead testing.

GML provides the supplies required to ensure a legal collection and specimen integrity, including

On-site collection assistance is also available. Please see your GML sales representative for details. GML provides specimen pickup by lab couriers trained in handling forensic, chain-of-custody specimens, and a complete chain of custody is maintained with full documentation. At GML specimens are maintained in a secure, locked area.

GML also offers emergency toxicology services for over 600 drugs and/or metabolites to assist in treating overdose patients. Testing for iron overdoses, lead poisoning, methanol ingestion, as well as blood gases and other diagnostic support procedures are available to assist clinicians in treating the toxic patient. Toxicology specialists are available to discuss confirmation of positive results and quantification of individual drugs.

Dr. Elsie YuDirector: Hoi-Yin Elsie Yu, PhD, DABCC

Dr. Margaret LoSheng-Ying (Margaret) Lo, PhD, DBACC


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