Substance (Ab)use During Methadone and Naltrexone Treatment: Interest of Adequate Methadone Dosage.

Focuses on the importance of poly substance abuse in methadone maintenance treatment and the need for appropriate methadone dosing. Reasons for increase in the abuse of heroine and other substances by patients under treatment; Polydrug abuse by naltrexone maintained patients; Correlation between polydrug abuse and social functioning.