hi, psychedelics are a very risky drug to take when you have other mental issues.
they could worsen it, damage you permanently, or even cause you to do things you otherwise wouldn't.
I am not a doctor. I am just telling you what a quick google search gave me
https://www.drugs.com/mtm/desvenlafaxine.html says you should wait for 7 days before taking an MAO inhibitor. out of this I assume that drug interactions with desvenlafaxine can happen 7 days after taking this medicine. so i'd wait 10 days before using LSD then to be safe.
https://www.drugs.com/mirtazapine.html from this i assume the same goes with mirtazapine
(/u/waxwing said 6-8 weeks so i'd say take his advice.)
I did not find anything about quetiapine but i assume that since it's in the same category, 10 days would also be safe.
I am not a doctor, anything i just said could be completely wrong. My only actual advice is to not take psychedelics when having mental issues. wait until you are in the right mindset, with the right friends, in the right place.
I appreciate the concern, I've taken them before in the past fine and being in a bad headspace isn't a worry. To be honest I felt much better for the following few days.
I was only taking a single anti depressant at the time and stopped it for 4 or 5 days before hand from memory. (I forget what but something like effexor or lexapro)
I did some googling myself but wasn't 100% confident on what I read so thought I'd ask here. 6-8 weeks seems excessively long but better to be safe than sorry I suppose.