I have heard some pretty amazing positive results from ibogaine being used to treat heroin addiction, as an initial step. As far as I know, it's not a panacea or magic pill... but its weaning effects make it possible for addicts to become "stable" for long enough that underlying issues can be addressed while in a semi-healthy and lucid state.

For me, the coolest thing about its potential is that it's not addictive, in and of itself... and subjects generally have zero desire to reexperience the psychedelic "trip" they experience during treatment.