Topics in Drug Testing from Quest Diagnostics

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Presumptive vs definitive drug testing: what you need to know

August 27, 2021


Today’s podcast will cover the value of prescription and illicit drug testing and provide insight on the different clinical drug testing methodologies. We will discuss and share information regarding the following:

  • Current state of the drug misuse epidemic in the US
  • The value and clinical utility of drug testing
  • Overview of the 2 main methodologies of drug testing, presumptive and definitive

The episode will feature Quest Senior Medical Advisor, Dr Jeff Gudin; Medical Science Liaison Jack Kain, PharmD; and Executive Science Director, Les Edinboro, PhD.

You may download a PDF version of this presentation here >>

To listen to other podcasts in our Topics in Drug Testing series, or learn more about Quest Diagnostics’ comprehensive drug testing offering, please visit There you will find our Drug Monitoring Test Directory, as well as educational resources and insights from our team of toxicology experts. At Quest Diagnostics we are committed to providing you results and insight to support your clinical decisions.