Thank you so much for your ansewers

One of my friends use antidepressants and sleepingpills, she wants to quit it and she also have a lot of issues, that I was thinking iboga and ayahuasca maybe could help her with, so she can moove forward in here life.. I am joining my first ayahuasca cermony in the last week of july, at a spiritual healing retreet with a shaman, with three tea cermonies, and she would really like to join me there. They say that no people on prescription pills can take ayahuasca.. But they dont say anything about how long time before you have to quit... So how serious is it? How dangerous could it be mixing antidepressants and sleepingpills with aya? ( I can find out what her pills are called next time I talk with her..) How long time before do you think she would have to quit? How long time does it take before those kind of pills are totally out of your system? Oh, and do you gyes now, would it be okey to microdose on iboga while she is weaning herself of the pills, or would that only be harmful as well? If she cant do eather aya or iboga for a while, do you think it would be a god ide she smoke dmt then? You can mix that with pills, right??