Whilst there is some support for the efficacy of residential treatment for young people, it is an expensive and potentially invasive option. Long-term residential places or beds for the rehabilitation of young people with drug use issues is complex as some may also be homeless, have mental health issues, or be unwilling to enter mainstream residential services. As such, it should only be considered where external supports (family, school/ work, accommodation, income etc.) have broken down, are openly hostile, are non-existent, or where there are significant mental health and other behavioural concerns present. Other risks associated with residential treatment include removing the young person from the functional aspects of their lives and exposing them to drug using peers (Stubbs et al. 2004).