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Fentanyl Surpasses Heroin As Drug Most Often Involved In Deadly Overdoses

A highly potent synthetic opioid, fentanyl is often mixed into other drugs sold on the street, including pills, heroin and even cocaine. (Getty Images)
A highly potent synthetic opioid, fentanyl is often mixed into other drugs sold on the street, including pills, heroin and even cocaine. (Getty Images)

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