Iboga can help people to kick certain bad habits. Especially when opiates are involved.
But iboga is expensive, illegal in many countries, much of it may not be harvested in a responsible manner, and it is not completely safe either.
Now, pharmacologically, DXM shares some mechanisms of action with ibogaine. It may be a shitty psychedelic, but as a tool to help people addicted to opiates, it may very well be a good alternative for iboga micro-dosing.
It is definately not safe, and probably even neurotoxic, when taken as a recreational drug. But in the amounts in wich it is taken when it is being used as a cough suppressant, it is pretty safe, as far as i know. And in those amounts it may even have neuroprotective, rather than neurotoxic properties, just like many other NMDA-antagonists.
I don't know if people have experimented with it, as a replacement for iboga. But i do know that it it ís effective as an antidepressant. You can find plenty of information on that, when you google it.
So i mean, it clearly has therapeutic potential.