The Metropolitan Transportation Authority is teaming up with the NYPD to battle heroin use in the city.
MTA police will now carry the drug Naloxone.
It's part of a program called "community overdose prevention," spearheaded by state Attorney General Eric Schneiderman, who's making the announcement at Penn Station on Tuesday.
Naloxone is administered either as a shot or a nasal spray, and has been shown to be an effective antidote to a heroin overdose.
Schneiderman is pushing to equip police officers with the drug throughout the city and state.