
Narcotics Anonymous was one of the early fellowships to emerge, after AA, and was aimed at people who had a problem with any type of narcotic or drug, legal or illegal, prescribed or non-prescribed.
People had begun to realise that it was better to have specific fellowships for specific problems, with a clear focus for each addiction.
People began to realise that Alcoholics Anonymous worked best when it had a single focus, alcohol. If it attempted to dilute that focus, then its message was weakened and it was less effective.
As such, AA was very keen to help other 12 step programs to develop by using the same 12 Steps and Traditions that AA had established. with the simple change that recovery focused on their addiction or behaviour.