So SWIM readed a lot of extraction teks on topia, but they don't seem to solve the nausea problem, although the topics were a bit old (2005).
Also SWIM has some heptane of his DMT extractions so he was think abt and extraction like this:
1 - grind the seeds, make 3 heptane soaks to clean the nasties;
2 - put the seeds on acidified water for some time;
3 - the pH low enough to turn the alkaloids to salt, keep the extract at the mouth so it can be absorpted there.
So what do you think? SWIM'S great concern is abt nausea and vomiting so what's the way?