Hi John,
There are lots of pain drugs out there. A good number of them are narcotic type drugs that probably work in a similar fashion to those you're taking. Lyrica works in an entirely different fashion and has recently been approved for fibromyalgia. Several drugs that were originally tabbed as anti-anxiety and anti-depressants can also be quite helpful in pain. I've heard that the nervous system circuits that effect pain, anxiety etc. are apparently found close to and interact with each other - so those are real possibilities. If you have inflammation there are anti-inflammatories and, of course, there are muscle relaxants as well.
Some people with pain are also helped by meditation techniques called 'mindfulness based stress reduction'. John Kabat Zinn has some books on those techniques. Other people are helped by acupuncture.
http://www.healthcentral.com/chronic-pain/find-drug.html
Good luck.