These photos will turn your stomach. Krokodil is a street version of desomorphine, an opiate that's 3 times more powerful and 10 times cheaper than heroin, and has become an epidemic in Russia. It's so named because regular users develop gangrenous, scaly skin resembling that of a crocodile. Krokodil is made with such toxic chemicals that it rots the flesh and bones of its users. WARNING: Extremely graphic images.