Originally Posted by
interrupted 
My sister is also a heroin addict, and if she has a mental illness I really don't know how we would know unless she stopped doing drugs for long enough to establish a solid baseline on which to measure.
Exactly. The rehab I went through was not there to diagnose mental illness. It was meant to address the addictions/alcoholism.
I was diagnosed with major depressive disorder and GAD when I was around
20 months clean/sober.
I treat my addictions/alcoholism by remaining proactive in my recovery. I treat my mental illness by remaining proactive in the mental health community, which includes medication, and seeing a psychiatrist and therapist.