Are you taking a 'cocktail' of pain and PN med at the same time?
I've found that most neuros who specialize in PN will Rx a pain med
along with the Neurontin.
I have been taking Tramadol (Ultram) along with my PN med
(currently Lyrica, but previously Neurontin)
for over 8 years with very good success.
The two meds together, are better than either one - independently.
They work on both the issues- of pain, and symptomatic relief,