Toronto has seen a recent drop in opioid overdose deaths. Dr. Dan Werb notes that while this is encouraging, the trend is fragile due to the unpredictability of the unregulated drug supply. A key factor has been the work of Toronto’s Drug Checking Service, led by Karen McDonald, which tests street drugs and provides vital information on potency and contamination. This service not only helps prevent overdoses but also connects people to broader harm reduction supports.

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