Naltrexone is an opioid blocker and can cut cravings. It works by blocking the pleasure effects of opioids in the brain. At the right levels, Naltrexone can cancel out the opioid ‘highs’ and may reduce general cravings in other addictions such as alcohol as well.
One of the hardest challenges is to remain addiction free long term. With opioids, UK services often switch a ‘bad’ opioid like heroin for a ‘better’ one like methadone or buprenorphine (Subutex), with low published annual success rates at achieving abstinence.
Naltrexone is almost exclusively taken daily in tablet form in the UK, if prescribed at all. With that, there may be temptation to stop taking it and go back to opioids.