Just my 2 cents - everyone here is right!
Any doctor can prescribe methadone for pain, and also for addiction, but only for two days for addiction - that would give someone who was severely addicted time to get through the "intake" at a clinic somewhere.
I currently take a low dose of methadone for addiction and I read up on it before I took it and also am learning all I can in order to be an advocate for it. Methadone saved my life - maybe not my physical life, but my marriage, my financial life, my spiritual life, kept me with my child, and generally allowed me to turn my life around after painkillers took my old life from me.
Anna Nicole was almost surely taking other things with her methadone or overdosing on it - low doses help when trying to abstain from drug use. The perfect way to describe the way I feel when taking methadone is this: Like I have never done drugs. Not that I am now clean from drugs, but like I never took them. I don't feel damaged at all. I have followed my orders from the doctor at my clinic to the letter and take home doses for six days, so I only go to the clinic one day a week. On that day I see my counselor and pick up my doses. It is simple. I am getting ready to wean off now. I understand that it is supposed to be hard, but I am committed to going very slow and easy.
I'll tell you anything you want to know about my experience with the clinic or the med itself.