A quality rehab center will treat you for any health problems that co-occur with your addiction – such as depression, bipolar disorder or past trauma.

At least 17.5 percent of adults with a mental health condition also have a co-occurring substance use disorder, according to the 2011 National Survey on Drug Use and Health. And people addicted to drugs are about twice as likely as the general population to suffer from mood and anxiety disorders, according to the National Institute on Drug Abuse.

Ask the rehab facility if they have a research-based dual diagnosis program (one such model is known as Integrated Dual Disorder Treatment (IDDT), developed by Dartmouth Medical School). Look for staff physicians who are certified in addiction psychiatry, and counselors with advanced degrees and experience in treating dual diagnosis cases. Ask how your care will be coordinated so that everyone is working toward your recovery.