WOODBURY - A heroin antidote is going to be onboard MTA trains.

The drug Narcan will be held on trains in the event of a heroin overdose.

The money is coming from a New York Attorney General's program.

At least $40,000 from civil and criminal forfeiture cases will be spent on 670 Narcan kits.

The kits will be carried by MTA officers on the LIRR and Metro-North.

Police officers in Suffolk and Nassau counties already carry Narcan.