Methadone maintenance programs are usually more successful at retaining clients with opiate dependence than are therapeutic communities, which in turn are more successful than outpatient programs that provide psychotherapy and counseling. Within various methadone programs, those that provide higher doses of methadone (usually a minimum of 60 mg.) have better retention rates. Also, those that provide other services, such as counseling, therapy, and medical care, along with methadone generally get better results than the programs that provide minimal services.
Methadone maintenance programs, while offering legal drugs as a substitute for their illegal counterparts, are still considered a continuation of the addiction. There are many physical harms created by the continued use of drugs like methadone etc.