- Fentanyl is a synthetic opioid up to 50 times more powerful than heroin
- The drug can be absorbed through the skin or inhaled
- Just a quarter of a milligram can kill someone
(CNN)The United States is in the midst of a drug crisis, with a 200% increase in the rate of opioid overdose deaths since 2000. Opioids are a class of drugs derived from the opium poppy, like morphine, codeine or heroin, but they also include the latest concern: synthetics like oxycodone, hydrocodone and the extremely potent fentanyl.