Therapy is what follows detox and it will continue for an extended period. Individual therapy allows you to open up to a therapist in a confidential scenario. The expert will work you to find out what has led you to enrolling at a drug rehab and what we can do to prevent that you ever come back here. This is largely due to dual diagnosis mental health treatment. A dual diagnosis is when a person is living with both an addiction and an underlying mental illness. This comprises nearly half of all addiction and is the leading cause of relapse. To fully treat your substance dependence, we must first address whatever is ailing you. With your source of the problem under control, we can move on to treating your addiction.