Earlier quoted context omitted.
Just curious - Why would someone on SSRIs not notice a thing? Forgive my ignorance but... Aren't those anxiolytic? Does that somehow prevent ayahuasca from functioning?
Why would someone on SSRIs not notice a thing? In the case of ayahuasca, quite possibly because they're dead . You don't mix SSRIs and MAOIs unless you have a very good idea what you're doing, and even then probably not without a reasonably well-equipped clinic to hand. Serotonin Syndrome is not something to fuck around with.
As an aside, it's a real pity that the side effects of MAO-A inhibition loom so large in people's imaginations. They're extremely effective anti-depressants and many of the risks can be easily mitigated, but GPs and even shrinks are now too afraid to prescribe them.