Thanks for all of these answers, everyone. I had read the helpful information on this site about avoiding harmalas with MDMA, which is why I was asking about changa the day before the MDMA, in case the harmalas might be retained in the body. I am also interested in DMT alone while on MDMA and had assumed, before reading the helpful information on this site, that it could create serotonin syndrome. It appears that is not the case. Still, I think if I do try these two things together I will go somewhat low for this first time. I'm thinking 100 mg MDMA plus a gram of mushrooms plus 30 mg of smoked DMT would be very interesting.