http://www.usnews.com/usnews/health/...926/26pain.htm

"Earlier this month, at an international pain conference held in Istanbul, doctors announced that two drugs combined to deal with this kind of pain are better than either one alone. Magdi Hanna of King's College Hospital in London treated over 300 patients with gabapentin, an antiseizure drug that's often used for chronic pain. For half the group, the researchers added oxycodone, an opioid painkiller. The combo knocked patients' feelings of pain down by 33 percent. Gabapentin slows down nerve signals, and opioids dull the brain's perception of discomfort. The two working better together than alone, Hanna says, underscores the fact that chronic pain has complex causes and should be treated by more than one type of therapy."