High-dose opiates could crack chronic pain: Nature News & Comment
http://bit.ly/1iWsaaL
Note: The author of this article titled it incorrectly, opiates only refers to natural opioids, like morphine and codeine. Opioid refers to:*natural opiates: morphine & codeine
*semi-synthetic opioids: hydrocodone, oxycodone, oxymorphone, hydromorphone, and diacetylmorphine/diamorphine/Heroin (although it is not legal in the USA, it is a commonly used opiate in the UK & other countries)
*synthetic opioids: fentanyl, sufentanil, meperidine/pethidine/Demerol