Vivitrol is a medication that is used to treat alcohol or opioid dependence. The active ingredient in Vivitrol is naltrexone, which is an opioid antagonist. Naltrexone works by binding to the same receptors in the brain that opioids and alcohol bind to, but without producing the same euphoric effects. This means that if a person … Continue reading How Does Vivitrol Reduce Cravings?