by: Heather Hegedus Updated: Feb 22, 2016 - 11:05 PM

BOSTON —

Karen and Joe Cannistraro live with the constant anxiety, fear, and worry of whether their son Luke is alive.

Luke started using pot as a teen, and now at age 20, he’s addicted to heroin. His parents say he fights in every day.

About a month ago, they had a serious scare and almost lost Luke to an overdose.  

"Whoever he was with made the phone call and said I'm a friend of Luke’s…he just OD'd," said Luke’s father Joe Cannistraro.

Doctors had to use the reversal drug Narcan on him, and because of that, he was given another chance that day.

“If it can save someone one time like that, you know to give someone a chance i mean thats a good thing,” said mother Karen Cannistraro.

But EMTs and first responders administering the drug say it’s frustrating when they have to revive the same addicts multiple times.

“When you wake them up with narcan, you try to give them the lecture and, you know, let them know that they've come that close to death, and maybe next time we won't get to them quickly enough.” Fitchburg EMS Bob Bourque said.

Karen and Joe believe Narcan saved their son’s life and warn anyone living with an addict to get some.

"You really need to have it in your home in your pocketbook or your car. I mean hopefully you'll never have to use it, but if you need it," Karen Cannistraro said.

These parents say addicts like their son aren’t thinking about dying. The addiction takes over and all they want is their next fix.

“It’s hard to stop. These addicts who are overdosing multiple times, they can’t. They can’t help it,” said Joe Cannistraro.

Sadly, during this FOX25 interview, Karen and Joe found out the Luke bounced out of rehab again.

For them, the cycle continues.