Buprenorphine / naloxone
"I have been taking Suboxone for about 2 and a half years for chronic pain that has multiple causes, including Fibromyalgia, neuropathy/neuralgia and arthritis.  Suboxone is TERRIFIC!  I have had more consistent relief than from when I took Oxycontin plus Oxycodone, Vicodin, etc.  I have virtually no side effects, and I completely credit Suboxone for my return to work after about 2 years of being disabled.  There are only 2 downsides I have experienced that potential users will want to be aware of.  New, acute pain, such as a sprain or injury is not "covered" by Suboxone.  I've also had an increase in tooth decay, but this is unfortunately an issue with all narcotics and drugs that can cause dry mouth.  Best of luck to all."