Quantitative Opiate, Opioid, and Benzodiazepine Testing by Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Area of Science:

• Clinical Chemistry
• Forensic Toxicology
• Analytical Chemistry

Background:

• The national opioid crisis is driven by synthetic opioids, with over 100,000 overdose deaths in 2021.
• Urine drug testing is crucial for clinical decision-making and monitoring patient compliance with controlled substances.
• Evolving drug trends necessitate advanced laboratory testing methods.

Purpose of the Study:

• To describe a rapid liquid chromatography-tandem mass spectrometry (LC-MS/MS) method.
• To simultaneously quantitate 21 opiate, opioid, and benzodiazepine drugs in urine.
• To provide a reliable method for assessing patient compliance and identifying drug abuse.

Main Methods:

• A rapid LC-MS/MS method was developed for simultaneous quantitation.
• The method uses 100 µL of urine and enzymatic hydrolysis of glucuronide conjugates.
• Quantitation involved multiple reaction monitoring (MRM) with a seven-point calibration curve and deuterated internal standards.

Main Results:

• The method achieved simultaneous quantitation of 21 opiate, opioid, and benzodiazepine drugs.
• Analysis time was less than 4 minutes.
• The method provides total drug measurement by including enzymatic hydrolysis.

Conclusions:

• This rapid LC-MS/MS method offers a robust and reliable approach for measuring commonly prescribed opioids and benzodiazepines in urine.
• The method supports clinical management of patients with substance use disorders.
• It aids in addressing the national crisis by providing timely and accurate drug testing results.