There is a treatment for opioid addiction, it's called methadone. It works very well and it takes a very long time. The US actually did exactly what you said, i

There is a treatment for opioid addiction, it's called methadone. It works very well and it takes a very long time. The US actually did exactly what you said, it was American doctors and universities who developed the programs now used around the world. https://en.wikipedia.org/wiki/Opioid_agonist_therapy https://en.wikipedia.org/wiki/Opioid_agonist_therapy