An overview of heroin, fantanyl, and prescription opioids (such as oxycodone/OxyContin, hydrocone/Vicodin, codeine, morphine, etc.). From the National Institute on Drug Abuse.
The MedlinePlus topic page for opioid information. This site was designed for patients/consumers and provides a comprehensive introduction to medical topics.
Regional statistics and directory of treatment efforts. Also provides resources and information for friends and family, health care professionals, public safety professionals, and opioid users.