Science has taken the soul-destroying power of heroin to the next level Watch
If you want to see the full extent of this drugs horrifying effects type "desomorphine" or "krokodil" in to google images.
Truly revolting stuff this is.
The problem is that the ingredients required to make it are readily available in Russia, if the Desomorphine was pure and properly synthesized in a lab the symptoms that earned it the name Krokodil would not be present (no scaly skin, no skin falling off, no internal rotting). Unfortunately it is far from pure and the way the addicts and the dealers prepare it results in the horrific side effects.
Another massive problem is the way that Russia treats its addicts, they are often left to rot on the outskirts of cities or in slums with no help whatsoever which when dealing with drugs of this level is basically a death sentence.