Topics in Drug Testing from Quest Diagnostics

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Drug testing your patients for marijuana

December 10, 2019


Today, we will be talking about marijuana and marijuana-based products in order to: 

  • Understand drug testing for marijuana, and why it’s important
  • Examine marijuana used in concert with controlled medications for pain or ADHD
  • Give some general recommendations for therapeutic drug monitoring for marijuana in patients with chronic pain using controlled substances
    • For example, at a minimum such patients should be tested before opioid therapy begins, again within 1 to 3 months, and randomly over the next 12 months, and more frequently if there are unexpected results, or there are complaints or behavior changes in the patient 

The episode features Quest Diagnostics Senior Medical Advisor, Dr Jeff Gudin, and Medical Science Liaison, Dr Jack Kain. They will be discussing drug testing your patients for marijuana.

You may download the PDF version of this presentation here >

To learn more, please visit for information on our Drug Monitoring Test Directory and offerings, as well as educational resources and insights from our team of toxicology experts. At Quest Diagnostics, we are committed to providing you results and insights to support your clinical decisions.