CBS Evening News | Narcan, a drug that can reverse the effect of an overdose, is now being used across the country, often in cases of heroin use. Don Dahler reports how the drug is administered, how it works and its impact in the communities where it is saving lives.

Overdose antidote saving lives, use expanding across the U.S.

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Narcan, a drug that can reverse the effect of an overdose, is now being used across the country, often in cases of heroin use. Don Dahler reports how the drug is administered, how it works and its impact in the communities where it is saving lives. Air Date: Feb 21, 2014

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