Anyone had an experience that created lasting (3 month or more) negative effects? An experience which did the opposite of healing?

Ive heard of it yes, sure there was a guy on the eboka forums that had a negative experience. Couldnt see anything when I had a quick look. Ive also heard of people having negative ayahuasca experiences and being depressed for months afterwards, there was a thread on the ayahuasca forums, again I cant find it sorry but Ive read of such things yes. Dig around here, eboka forums and ayahuasca forums and you will find reports.

i would imagine iboga would be rather easy to have a negative experience with, if you have no sitter.