Fentanyl, xylazine, and bromazolam: Urine toxicology trends in a San Francisco safety net opioid treatment patient cohort 2023-2025.

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Title: Fentanyl, xylazine, and bromazolam: Urine toxicology trends in a San Francisco safety net opioid treatment patient cohort 2023-2025.
Authors: Halifax JC; Division of Epidemiology, School of Public Health, University of California, Berkeley, CA, USA. Electronic address: john_halifax@berkeley.edu., Lim L; Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA, USA., Ahern J; Division of Epidemiology, School of Public Health, University of California, Berkeley, CA, USA., Steiger S; Department of Psychiatry and Behavioral Sciences and Family and Community Medicine, University of California San Francisco, San Francisco, CA, USA; Department of Medicine, University of California San Francisco, San Francisco, CA, USA., Shapiro BJ; Department of Psychiatry and Behavioral Sciences and Family and Community Medicine, University of California San Francisco, San Francisco, CA, USA., Lynch KL; Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA, USA; Clinical Laboratory of San Francisco General Hospital and Trauma Center, San Francisco Department of Public Health, San Francisco, CA, USA.
Source: Drug and alcohol dependence [Drug Alcohol Depend] 2026 Jul 01; Vol. 284, pp. 113185. Date of Electronic Publication: 2026 May 01.
Publication Type: Journal Article
Journal Info: Publisher: Elsevier Country of Publication: Ireland NLM ID: 7513587 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-0046 (Electronic) Linking ISSN: 03768716 NLM ISO Abbreviation: Drug Alcohol Depend Subsets: MEDLINE
Database: MEDLINE Ultimate
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  Data: Fentanyl, xylazine, and bromazolam: Urine toxicology trends in a San Francisco safety net opioid treatment patient cohort 2023-2025.
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  Data: <searchLink fieldCode="AU" term="%22Halifax+JC%22">Halifax JC</searchLink>; Division of Epidemiology, School of Public Health, University of California, Berkeley, CA, USA. Electronic address: john_halifax@berkeley.edu.<br /><searchLink fieldCode="AU" term="%22Lim+L%22">Lim L</searchLink>; Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA, USA.<br /><searchLink fieldCode="AU" term="%22Ahern+J%22">Ahern J</searchLink>; Division of Epidemiology, School of Public Health, University of California, Berkeley, CA, USA.<br /><searchLink fieldCode="AU" term="%22Steiger+S%22">Steiger S</searchLink>; Department of Psychiatry and Behavioral Sciences and Family and Community Medicine, University of California San Francisco, San Francisco, CA, USA; Department of Medicine, University of California San Francisco, San Francisco, CA, USA.<br /><searchLink fieldCode="AU" term="%22Shapiro+BJ%22">Shapiro BJ</searchLink>; Department of Psychiatry and Behavioral Sciences and Family and Community Medicine, University of California San Francisco, San Francisco, CA, USA.<br /><searchLink fieldCode="AU" term="%22Lynch+KL%22">Lynch KL</searchLink>; Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA, USA; Clinical Laboratory of San Francisco General Hospital and Trauma Center, San Francisco Department of Public Health, San Francisco, CA, USA.
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  Data: <searchLink fieldCode="JN" term="%227513587%22">Drug and alcohol dependence</searchLink> [Drug Alcohol Depend] 2026 Jul 01; Vol. 284, pp. 113185. <i>Date of Electronic Publication: </i>2026 May 01.
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        Value: 10.1016/j.drugalcdep.2026.113185
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              Text: 2026 Jul 01
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