Pete - I am sorry that you are in such pain. I don't have any advice to offer as the Neurontin has been my best med buddy ever (with the exception of any spinal lesions acting up. Then nothing helps). But I do have a big and gentle

for you and hope that you can come up with something for the pain.
I know that, excuse the MS cog fog, someone just posted that they found a med that worked for them. I'll look for the thread and post the link.
Here it is:
http://neurotalk.psychcentral.com/thread48971.html
BTW- what kind of pain are you in? That makes a difference on what kind of med would work.