- The opioid fentanyl killed pop superstar Prince, a medical examiner's report said
- The prescription painkiller can be 100 times more potent than morphine, experts say
- It can be absorbed through the skin, and an amount the size of three grains of sand can be deadly
Sacramento, California (CNN)America's addiction to opioid-based painkillers and heroin just got exponentially more dangerous. The most potent painkiller on the market, prescribed by doctors for cancer treatment, is being made illicitly and sold on the streets, delivering a super high and, far too often, death.