Authorities warn the synthetic opioid could be resistant to naloxone, a drug used to immediately reverse overdose. Getty Images/iStockphoto A flesh-eating drug about 10 times more potent than morphine ...

Amber Neitzel of Joliet says she first noticed the wounds on her skin 18 months ago. "It almost starts like a burn from a cigarette," she said. "It starts purple and then goes into a blister after ...