Methadone is prescribed to help you keep off street drugs such as heroin. It can help to prevent the unpleasant withdrawal symptoms which can occur when you stop using drugs like these. It is taken by mouth as an oral liquid and it works as a substitution treatment. Many people choose to stay on methadone long-term, although some people gradually reduce their dose and come off it.
This is a companion discussion topic for the original article at https://patient.info/medicine/methadone-oral-solution-metharose-physeptone