Depending on what the drug is and how often it was used/abused. If it's drugs such as heroin, cocaine, or meth, a rehab would be best. If it's marijuana, you can quit that tomorrow if you wanted to.
I have linked a site that shows you how to correct imbalances in your foot, which is the main cause of fibromyalgia pain. Most fibromyalga treatments revolve around doctors or medical professionals...
It would depend on what kind of treatment you imply. Any kind of 12-step focused treatment works if the patient has a strong enough desire. Methadone does not have many positive results, but he new...
I've seen figures quoted from 85-98% for percentage of opiate addicts that relapse and become addicted again. It's VERY discouraging, being an addict myself. Do try, however.