In cases of extreme opiate addiction (using a significant quantity for a very prolonged period of time) they do use methadone
as a treatment (there are methadone
clinics all over that are doing this). However, as I learned with my g/f, methadone is highly addictive, or if you would rather say - the body becomes very dependent on it. After 3 years of self research, I learned in most cases, it becomes a maintenance drug, rather than a detox drug - because it is that difficult to get off of.