Rising threat of nitazenes joins fentanyl in Canada's toxic drug supply

Firefighters in Ottawa are responding to more opioid calls, and administering more doses of naloxone.

The toxic drug crisis has taken more than 47,000 lives in Canada since 2016 and the synthetic opioid fentanyl has become a household name. But now, an even more potent class of synthetic drug is showing up in drug busts across the country: nitazenes.