m not sure whether you can even take another one, like Cymbalta, or Triavil. . and Triavil has Amitriptyline in it. So, if
the Amitriptyline
is working
for you at all, I can't see a reason to switch to another one.
The Gabitril and Neurontin will only help most likely, if you're having nerve-related pain....and everybody seems to be hit or miss with these. They can have some profound side effects too....but it's worth a try.