Just to finish off my two cents in here, after the whole episode with the friend i sold some O-PCE to and his subsequent sickness, i said I would take it upon myself to duplicate his pattern of use to look for any kind of immuno-suppression - over the course of about 4 days i routinely vaporized between 5-10mg from a bulb or on top of cannabis maybe 4-5 times each night, using about 100mg total. About 3, maybe 4 days later after running out of the stuff and figuring that'd be enough, that day while at work I became quite ill. Sudden onset of either a particularly bad cold or the flu. Fever, chills, a feeling of weakness and as if I were about to faint, just general flu symptoms. It is extremely, extremely rare that i get sick from common illnesses. I was bedridden for 5 days taking 2 500mg paracetamol every 6 hours and still shivering the moment i got out of bed. So.... Again, potentially all coincidence, but 2 for 2 between my friend and I who rarely get sick normally, the regular use over a period of days without a day off and we each came down with a particularly bad illness. Take from that what you will. I don't intend on purchasing anything but 3-meo-PCP from now on.