Naltrexone is an opioid antagonist medication that works by blocking the effects of opioids. Patients taking naltrexone receive a monthly injection, which reduces cravings for heroin/opioids and also blocks the brain’s opioid receptors from the patient feeling any euphoric effects should they impulsively use heroin. Naltrexone cannot be administered to a patient until he or she has been totally withdrawn from opioids (a procedure known as detoxification) and has been opioid-free for at least 7 days. Naltrexone prevents relapse and can also be used by patients who have been in treatment and have tapered off buprenorphine as an added protection against relapse.

The following modules and webinars give a deeper understanding of naltrexone: