What is the opioid antagonist used in the treatment of morphine or heroin addiction?

Naltrexone, marketed as Revia, is an opioid antagonist that is used in the treatment of opioid addiction, including morphine and heroin dependence. It works by blocking the effects of opioids at their receptor sites in the brain, which helps to reduce cravings and the potential for relapse in individuals recovering from opioid use disorder. The use of naltrexone supports individuals in maintaining abstinence by preventing the euphoric effects that can be experienced if they relapse and use opioids again.

While other options listed also play significant roles in the treatment of opioid dependency, they function differently. For instance, Suboxone, which contains buprenorphine and naloxone, is a partial agonist that can help to reduce withdrawal symptoms and cravings while lowering the risk of misuse. Methadone is a long-acting full agonist that can stabilize patients by preventing withdrawal and cravings but does not block the effects of other opioids like naltrexone does. Buprenorphine, similar to Suboxone, is also a partial agonist used in the treatment of opioids, but it will not work as an antagonist in the way naltrexone does.

Thus, naltrexone is specifically recognized for its antagonistic