Xylazine Surveillance
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Xylazine Detection Aggregated by Month
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Proportion of Samples with a Positive Xylazine Detection by Month
Xylazine Surveillance, Past 6 Months
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Xylazine Detection Aggregated by Week in the Past 6 Months
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Proportion of Samples with a Positive Xylazine Detection by Week
Xylazine Upset Visualization
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Co-ocurring Substances with Xylazine in Xylazine-Positive Samples
Above is an UpSet plot (similar to a Venn Diagram but with numbers) showing all samples positive for xylazine over the course of this study. So far, xylazine always co-occurs with fentanyl and its associated compounds, tentatively suggesting xylazine is an adulterant of illicitly manufactured fentanyl in San Francisco. This fits with national trends, where xylazine has been added to the opioid supply but not to other classes of drugs
Co-occurring w/ Xylazine, Refined
Same plot but with some intersections of frequency 1 removed
Co-occurring w/ Xylazine, Past 6 Months
Comprehensive Drug Screening
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Co-occurring Substances from September 2024 to today
3rd 6 months, March to August 2024
2nd 6 months, September 2023 to February 2024
1st 6 months, March to August 2023
Prevalences of Substances of Interest
Prevalences of Substances of Interest
Fentanyl Analogs
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Co-occurrences of Fentanyl Analogs
Co-Occurrences of Fentanyl Analogs, Refined
Co-Occurrences of Fentanyl Analogs in the Past 6 Months
