susanne,
Some people with neuopathies take gabapentin with good results. i'm not that familiar with your problem, so the best I can give you is a generalization based on other's neuropathies. Gabapentin, in some people can make them extremely drowsy, but others do fine with it.

If you wind up needing morphine, don't fight it. No one likes to make that leap into narcotics, but sometimes it can't be prevented. You shouldn't have to be in agony all the time.

Sam