Is it possible to cure a drug addiction (not mine) without the help of a professional. like any vitamins or natural b6 supplements?

Not likely: The first of the 12 steps of narcotics anonymous (like aa) is for the addict to admit that he or she is powerless over their addiction, that their lives had become unmanageable. The addict needs help, he or she cannot do it alone.

Not beneficial : There are many things that lead to an addiction and consequences of an addiction that should to be explored with the assistance of a professional. Furthermore, behavioral changes and coping skills need to be learned to remain clean and sober. One can achieve this through the assistance of a specialist who is trained in addiction. At the very least, one should explore getting help through aa or na.