Welcome to the Nexus! I also can't advise you on the drug addiction issue, but as has already been said, be careful and use caution. It seems like you're already on the right track, especially with your friend researching and understanding what happened. Often, entheogenic trips will have powerful effects, but every person is different. Some people have gone through so much hell in life that one single Ibog or DMT trip is not going to magically turn their life around and live happily ever after. Transformation is a process.