One last Vice video, I found this worthy of posting. (NSFW)
Krokodil: Russia's Deadliest drug
It's origins are estimated to be somewhere around Siberia; this homemade drug has some of the most horrifying effects on the human body I have ever seen. The name is Russian for Crocodile and is amply named for the scale like green tint it give's the user's skin as it rots away their flesh from the inside out. The most common way of using the drug is through injection much like heroin and probably contains unspeakable ingredients such as lighter fluid, kerosene, and other unknown liquids.
The backstory behind the people who have become dependent on this drug is heart breaking, some owing money to loan sharks that would see their legs broken within the next week, so they use without care.
Attached is a severe advanced case.