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An Even Deadlier Opioid, Carfentanil, Is Hitting The Streets

03:27
First responders have found that standard doses of naloxone aren't always enough to counteract the powerful sedating effects of carfentanil. (Getty Images)
First responders have found that standard doses of naloxone aren't always enough to counteract the powerful sedating effects of carfentanil. (Getty Images)

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