peripheral neuropathy
"I've been on Neurontin for over 2 years now, 3200 mg daily / 800 mg four times daily. 
It is the only medication that effectively controls the idiopathic neuropathy in my feet. 
Lyrica was totally ineffective.  I experienced serious "brain fog" fatigue and short-term memory problems when I started Neurontin but these side effects are now manageable.
Neurontin has restored my quality of life to near normal."