Overdose deaths with evidence of counterfeit pill use became more than twice as common between the second half of 2019 and the end of 2021, according to a new CDC report. (Tomas Nevesely / iStockphoto / Getty Images)

Illicitly manufactured fentanyl was involved in nearly all overdose deaths with evidence of counterfeit pills use, including more than two out of five deaths that were exclusively caused by it, CDC researchers found.

(WTTW News)

There were 103 overdose deaths attributable to fentanyl in Cook County in 2015. That number shot up to a record 1,825 in 2022, according to statistics from the Cook County Medical Examiner’s Office. That accounts for more than 90% of all opioid-related deaths in the county.

(WTTW News)

The synthetic opioid fentanyl remains a danger in Chicago, especially in Black and Latino communities, where the odds of a fentanyl-involved overdose have significantly increased in recent years.

The overdose-reversal drug Narcan is displayed during training for employees of the Public Health Management Corporation (PHMC), Dec. 4, 2018, in Philadelphia. (AP Photo/Matt Rourke, File)

The U.S. Food and Drug Administration on Wednesday approved selling the leading version of naloxone without a prescription, setting the overdose-reversing drug on course to become the first opioid treatment drug to be sold over the counter.

Naloxone reverses an opioid overdose if administered in time. (WTTW News)

The key culprit appears to be the widespread availability of the powerful synthetic opioid fentanyl.

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U.S. Sen. Mark Kirk expands efforts to fight heroin overdoses in Cook and surrounding counties.