Using Urine Drug Testing to Track Xylazine-Fentanyl Copositivity in a Changing Drug Supply - Top-Institutions - MDSpire

Using Urine Drug Testing to Track Xylazine-Fentanyl Copositivity in a Changing Drug Supply

  • By

  • Janet E. Childerhose

  • July 9, 2026

  • 0 min

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Top Institutions in Psychiatry

Brief introduction explaining scope and methodology.

  • #1

    Philadelphia Medical Examiner’s Office
    Philadelphia Medical Examiner’s Office

    Philadelphia, PA

    Key Differentiators

    • Toxicology

  • #2

    Millennium Health
    Millennium Health

    San Diego, CA

    Key Differentiators

    • Toxicology

Original Source(s)

Using Urine Drug Testing to Track Xylazine-Fentanyl Copositivity in a Changing Drug Supply

  • by Janet E. Childerhose

  • July 9, 2026

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