What's in the last 100 samples sold as methamphetamine?

How often are drug types found together in confirmed drug checking results?

A given drug sample can have multiple positive results for different drugs. One way to examine these results is to look at how often things are detected together. In the heatmaps below, we present the percentage of samples testing positive for the pair of drugs or drug categories listed, in the most recent 100 samples sold as methamphetamine (which means the percentage is the number of samples with that pair). This comparison of the co-presence of two drugs cannot account for the fact that there are often three or more drugs present. The diagonal (where the column name and row name are the same) represents those samples testing positive for only that drug category (these samples may have tested positive for a drug category not listed here). The rows and columns are ordered from largest to smallest share of drug checking samples, alone or in combination. For more details on drug categories named, click here.

For example, if you mouse over the Methamphetamine alone cell (Meth row and Meth column), you can see that 72% of samples tested positive for methamphetamine and for no other drug category in the matrix. If you move along the Meth row (or column) you can see the share of all samples that tested positive for meth and that other drug type, with or without any other drug mentioned here or any drug not included in the matrix. One-quarter of samples sold as methamphetamine had meth and one or more phenethylamines, a class of drug that includes MDMA and MDA. The Cocaine alone cell indicates that one sample had only cocaine. The Fentanyl and Other analgesics cell indicates 2 samples had this combination, with the Fentanyl and Meth cell indicating neither of these samples were positive for methamphetamine. Together, those are the 3 samples sold as meth that had no meth.

Data notes

Drug testing sites can do little about potential cross-contamination: The container a client used may or may not have been used before. Therefore, any unusual combination may be due to cross-contamination and not represent drugs actually sold together. Results represent a snapshot of the last 100 samples with confirmatory testing results as of 11:15AM PST 15 January 2025.

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