Naloxone is used to curb drug cravings as it blocks opiod receptors so you can't get high when you take it and thus weaken the reward pathway circuit in your brain's reward system. This has been studied in prison systems to lead to less repeat offenders for drug related offences (dui) when given naloxone in prison. I wish I could find the study.
the article talks about treatment with Vivitrol which is similar to suboxone, except it can't be abused (and therefore has no street value) and is a monthly injection instead of a daily.
Naloxone/Narcan is for immediate treatment of an overdose
https://www.huffingtonpost.com/entry/inmates-heroin_us_56966...