What is the role of drugs surrounded by addiction treatment?

I'm just wondering what methadone is for, why it is needed for retrieval.What is the role of drugs surrounded by addiction treatment?
The drugs are able to backing restore the brain functioning back to majority. They also relieve the patient of craving for heroin, and they suppress debt symptoms. It also blocks the effects of heroin. The drugs make it easier for the merciful to recover surrounded by a shorter amount of time, and prevents relapse as well.
Methadone is not "needed" for taking back but has be found in clinical trials to be influential in substance use taking back. What it does is create a sort of "allergy" to the drug so that the user pairs violent disorder with drug use and through association learn to loathe both.

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