Urine Testing Typically Only Identifies The Presence of a Drug

Interviewer: What are some of the issues that can confound the test or cause it to be inadmissible in court?

Leckerman: The issues that come up with urine testing revolve around identification and quantification of drug compounds. When a state laboratory in New Jersey is testing urine for a routine DWI case, it does not typically test urine samples to show how much of a particular drug is present. The laboratory is typically looking for the presence of drugs of abuse only. Once the drugs of abuse are identified, the laboratory only reveals that finding in a lab report. For example, the laboratory may reveal whether cocaine is present or if the THC metabolite from marijuana is present or if derivatives of heroin or prescription opiates were found. The laboratories identify what is present, but they do not quantify the amounts present.

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