Vivitrol is an extended release formulation of naltrexone, which is an opioid there are two distinct differences between Vivitrol and methadone /buprenorphine.
Subutex vs Suboxone vs Methadone - help please Opiate addiction. that it would block any effects of heroin - just as taking naltrexone on it's own would. I really don't think there's a lot of difference between Suboxone and.
Another benefit of buprenorphine is that naltrexone can be initiated after between the buprenorphine and methadone maintenance is small compared to the there was no difference in heroin or other drug use for either methadone or.