More than 70 per cent of street drugs tested by the NorWest Community Health Centres (NWCHC) in Thunder Bay, Ont., recently contained medetomidine, a potent veterinary tranquillizer. According to the Office of the Chief Coroner, the city maintains the highest opioid-related death rate in Ontario, reaching more than five times the provincial average.
Why is medetomidine appearing in street supplies?
The presence of medetomidine, a sedative typically used in veterinary medicine, suggests an increasingly volatile drug supply. Nicole Fieduna, a manager at NWCHC, notes that the organization’s drug checking services frequently identify mixtures containing as many as six or seven distinct substances. This rapid evolution of drug composition forces frontline harm-reduction services to constantly adapt their testing protocols. Since April, NWCHC has issued 10 separate drug alerts to inform the public and emergency responders of these toxic findings.

The drug analyzer used by the NWCHC mobile outreach van can perform both trace scans on tiny samples and bulk scans using lasers to peer through packaging, providing results in minutes.
How are harm-reduction services evolving?
Following the closure of the Path 525 supervised consumption site in March 2025, NWCHC secured a federal exemption under the Controlled Drugs and Substances Act. This allows the organization to operate its drug analyzer from a mobile outreach van, which does not require clients to be on a fixed site. Because the province’s Homelessness and Addiction Recovery Treatment (HART) Hubs prohibit substances on-site, the mobile unit serves as a critical bridge for individuals seeking to test their supply. Fieduna reports that usage of these checking services has increased monthly since the van launched in June.
What role does advanced testing play in public safety?
Beyond local testing, NWCHC now sends drug samples and used equipment to Toronto for comprehensive laboratory analysis. According to Fieduna, this process helps identify emerging trends before they become widespread within Thunder Bay. While testing does not guarantee a change in consumption habits, officials emphasize that “knowledge is power,” allowing users to make more informed decisions about the substances they encounter. The organization also promotes the use of the LifeguardConnect app, which features a “use alone” timer that can alert emergency services if a user becomes unresponsive.
Pro Tips for Staying Informed
- Mobile Testing: The NWCHC outreach van operates Monday through Friday, 8:30 a.m. to 4:30 p.m. ET.
- Direct Contact: Reach the outreach team for location updates or support at 807-630-8631.
- Digital Alerts: Download the LifeguardConnect app to receive real-time drug alerts and access local resources.
Frequently Asked Questions
What is medetomidine?
It is a veterinary tranquillizer that has been increasingly detected in street drugs across Thunder Bay, according to testing data from NorWest Community Health Centres.
How can I get my drugs checked in Thunder Bay?
The NorWest Community Health Centres operate a mobile outreach van that provides confidential drug checking services. You can locate the van by calling 807-630-8631.
Are opioid-related deaths decreasing?
While provincial and national data show a downward trend in opioid-related deaths, northern Ontario communities—specifically Thunder Bay—continue to experience disproportionately high rates, according to the Office of the Chief Coroner.
Stay informed on local health initiatives and harm-reduction updates. Subscribe to our newsletter for the latest reports from community health agencies.
