America's Addiction to Opioids: Heroin and Prescription Drug Abuse ...

https://www.drugabuse.gov/.../americas-addiction-to-opioids-heroin-prescription-drug...
With repeated administration of opioid drugs (prescription or heroin), the ..... with a growing number of prescriptions in and diversion from the legal market.


What are opioids? | National Institute on Drug Abuse (NIDA)

https://www.drugabuse.gov/publications/research...drugs/opioids/what-are-opioids
Opioids are medications that relieve pain. They reduce the intensity of pain signals reaching the brain and affect those brain areas controlling emotion, which ...