Opioids are a class of drugs used to reduce pain.
- Algren D, Monteilh C, Rubin C, et al. Fentanyl-associated fatalities among illicit drug users in Wayne County, Michigan (July 2005-May 2006). Journal Of Medical Toxicology: Official Journal of the American College Of Medical Toxicology [serial online]. March 2013; 9(1):106-115.
- Centers for Disease Control and Prevention. Increases in Drug and Opioid-Involved Overdose Deaths, United States, 2010-2015. MMWR 2016.