Well, depending on the type of substance ODed on, one could probably call the effects similar to suffocation.
The picture that was supposedly sent by "Byuu" however seemed antidepressant heavy, which even if you did manage to take enough of those fuckers to OD, would likely cause serotonin syndrome, which is an entirely different thing and involves hallucinations, convulsions, heart palpitations, overheating, dehydration, that kinda fun stuff. Never heard of suffocation from it though.
Speaking of the pill picture I wonder if there's a reverse image search equivalent on the dark web, for someone as retarded as byuu seems to be it wouldn't surprised me if they just ripped some dnm pharma vendors product pic considering that seems like it would be a lot easier than obtaining that much of that variety of psych drugs in nipland.