It's so rare it isn't studied, so I can't say if 5-Meo can cause it. HPPD in theory is caused by a strong intense memory, and when something familiar to that m

It's so rare it isn't studied, so I can't say if 5-Meo can cause it. HPPD in theory is caused by a strong intense memory, and when something familiar to that memory occurs it brings that person back to that mental place. If this is what is going on, then you're going to have a hard time forming a strong memory to something when you're passed out or so out of it you're not paying attention to the setting around you. So, I imagine HPPD is not a thing in 5-Meo, but as I said there are not studies on it. HPPD is rare.