Opioid Overdose Centers for Disease Control and Prevention (CDC) - about prescription opioids, illegally made & distributed fetanyl and heroin. About the epidemic and epidemiological data. Information for patients and providers.
Opioids (Substance Abuse and Mental Health Administration) Links to data from various national surveys.
Ending the crisis : Mayo Clinic's guide to opioid addiction and safe opioid use by 
The opioid epidemic : what everyone needs to know by 
