Introduction:
Addiction to opioids poses serious problems for communities, families, and individuals. Solutions sometimes seem uncertain, difficult, and controversial. Most of patients can not tolerate drug abstinence permanently and they continue to live through preparing and using drugs permanently if there is no method of maintenance treatment. Methadone Maintenance treatment (MMT) has become a major intervention in the care and treatment of drug dependence in many countries. Now MMT is used as a maintenance method in Sari and we decided to evaluate this method in addicted patients in private MMT clinic.