Naltrexone is a prescription medication used in the treatment of opiate and prescription opioid abuse and addiction because it stops the activity of opiates. It is also used in the treatment of alcohol addiction as it appears to decrease the user's desire to drink. Naltrexone can either be administered daily by tablet, or there is an extended-release injection that can be administered once per month, although the injection can cost up to $1,100 per month.
The difference between Naltrexone and other drugs used to treat opiate addiction is that not like Methadone which is an agonist and has many of the same properties as heroin, Naltrexone is an opiate antagonist, and negates the effect of opioid meds. Someone who has been off all opioid meds for seven to ten days can begin taking Naltrexone, but they will have to stop taking all other opioid meds while taking the medication. This would include taking Methadone or similar maintenance therapy drugs, due to the fact that taking Naltrexone along with these kinds of meds can cause sudden withdrawal reactions.
Naltrexone is meant to be used along with a full Anna rehab program which would include counseling, behavioral modification, lifestyle changes, and compliance monitoring.