"Krokodil" is a cheap, nasty substitute for heroin that's undergoing a wave of popularity in certain circles of junkies in Russia. The side effects include gaping ulcerous sores--great big ones. I remember the good old days when people took real drugs, instead of just injecting industrial waste into their veins. Sigh.
This is in the running for all-time most screwed up things ever. The article is accompanied by the kind of photo that Warren Ellis likes to mail to people to induce retinal scarring. You have been warned.
More: And of course, it took Warren about two minutes to latch onto this stuff. The iodine smell is a nice touch.