Is having such a drug available helping or is it enabling an out-of-control situation? It's reached a point now where children have been endangered because the adults supervising them have collapsed from overdoses.
Narcan will reverse the affects, but not for long. It puts the user into almost immediate withdrawal. They are up and back on the street, using in no time fast.
The drug is so addictive users take it even after they see friends overdose on it. Sometimes it is immediately fatal. President Bush bombed a factory in Mexico in 2006 when these deaths were sweeping across the U.S. The only remedy is to remove the supply. It is too addictive for success rates. This is what Trump understands and will remedy with force.