The thing that could cure drug addiction is illegal

It's called ibogaine and I heard about it on an episode of Law and Order and thought it was fake. Then I looked it up. According to Wikipedia ibogaine is a "naturally occurring psychoactive substance found in a number of plants". It is illegal in many countries (most likely due to it's psychoactive nature) and used to cure addictions to all sorts of drugs in others including heroin, cocaine,