Xylazine-Fentanyl Positivity and Concentration in Urine Drug Tests - Takeaways - MDSpire

Xylazine-Fentanyl Positivity and Concentration in Urine Drug Tests

  • By

  • Olivia K. Sugarman

  • Charles Marks

  • Penn Whitley

  • Brendan Saloner

  • Danielle German

  • July 9, 2026

  • 0 min

Share

  • 1

    The opioid crisis has resulted in nearly 1 million deaths from overdoses in the US since 1999, with increasing drug-related injuries.

  • 2

    Xylazine, a veterinary sedative, is increasingly found as an adulterant in fentanyl, detected in 38% of fentanyl powder samples by 2024.

  • 3

    Xylazine-involved overdose mortality rose 5- to 10-fold from 2020 to 2021, and it is linked to severe soft tissue wounds requiring urgent care.

  • 4

    A study analyzed urine toxicology results from March 2023 to September 2025 to assess xylazine prevalence and concentration in drug users.

  • 5

    Xylazine testing was added to Millennium Health's panel in March 2023, focusing on specimens positive for both xylazine and fentanyl.

Original Source(s)

Xylazine-Fentanyl Positivity and Concentration in Urine Drug Tests

  • by Olivia K. Sugarman, Charles Marks, Penn Whitley, Brendan Saloner, Danielle German

  • July 9, 2026

Related Content

Prediction models for progression from prediabetes to diabetes: a systematic review and meta-analysis

Wearable-Derived Data for Patient Frailty: Extending Hospital Frailty Risk Score While Confronting Bias and Inequities

Self-Sampling Shows Test Agreement

The study authors frame the device as a potential way to simplify screening, while emphasizing that larger validation studies are still needed.