Actually, I had a strong experience on amazonian cubensis at the time and it resulted in ego-loss. It was extremely traumatic cause I saw what I was doing and it was not good. I was depressed for a while afterwards. I could not continue to do what I was doing after that. Although I did continue for a while afterwards. It stuck in the back of my mind and I turned myself into rehab shortly afterwards. 

Something that is supposed to be really good for that is iboga. Do some research into it. It is supposed to be very effective on stopping addiction. Here is the link to the sub-forum here on the Nexus about iboga.