(Update: After a good sleep I feel... fine. I'm not noticing any impairment whatsoever; everything seems back to normal. This 'maf' is going in the trash at the first opportunity)
I placed an order for a small amount of MAF from a darknet vendor around a month ago and the package arrived in my mailbox earlier this week - frustratingly late, but no big deal.
Upon dosing 100ug, a standard MAF recreational amount, I felt the first tingles of an opioid high which quickly receded into the background of my psyche. Repeated dosing brought me to half a milligram and gave the desired effects - relaxation, mostly, as fent and its analogues aren't known for their outright euphoria a la the morphinans (heroin etc). I fell asleep.
This morning I woke up feeling as though I'd suffered a stroke. My face was somewhat numb and I had difficulty keeping track of my morning routine. I pushed onwards to work where I found myself intellectually dwarfed by my regular tasks. I felt - still feel - confused and out of my depth. I hosted a stuttered meeting, my usual eloquence stepping aside to be replaced by an autistic and borderline intellectually impaired ramble.
Having only slept for a couple of hours last night, I chalked this up to sleep deprivation and stupidly took more of this 'MAF' on arriving home, whereupon the symptoms intensified and I realized their origin. Fentanyl and opioids in general do cause brain-fog, though not to this extent; I can barely read and comprehend a single paragraph of text. I've had to rewrite this post at 20WPM to correct mistakes totally uncharacteristic of myself. I feel I'm writing this post stateless - I have very little awareness of what I've written above, I'm only carrying a thread of thought at the sentence level as opposed to building on a coherent whole, and the jolting awkward cadence of the text is testament to how impaired I am.
Something is seriously wrong.
I purchased this supposed MAF through a minor vendor almost certainly not responsible for a custom synthesis, which means one of the larger Chinese darknet or clearnet vendors is selling large quantities of this toxic chemical under the same name.
I'm going to fall asleep early in the hopes that some strange combination of mu agonism or kappa agonism and sleep deprivation in fact is the cause of this impairment, and will post an update tomorrow. God I hope this isn't permanent.