Toxic Opioid Carfentanil More Potent than Fentanyl in Thunder Bay

The chemical formula of Carfentanil – Depositphotos.com
THUNDER BAY – HEALTH – “Carfentanil is a toxic opioid that is more potent than fentanyl and is sometimes mixed into street drugs,” said Dr. Emily Groot, Associate Medical Officer of Health for the Thunder Bay District Health Unit.  “Street drugs contaminated with carfentanil have been detected with increasing frequency in Canada, and this is the first confirmation we have of it in Thunder Bay.&r