I don't think so....From what I know about it is that it stops them from getting sick and their bodies going through withdrawal symptoms. My daughter had a problem with heroin when she was younger and we tried the methadone treatment. It didn't work for her. Going to jail and tough love finally worked after countless rehabs. The methadone was just an easy fix and she would get her methadone then try to sneak out & buy dope. Thankfully today she is clean & sober for years and has a good life.
Thank God for that! And bless you for standing by her through it.