I have been on gabapentin for almost 15 years now. At my initial diagnosis of IPN I resisted medication but after a few years I finally started on a low dose. I definitely noticed that I was tired but as with most medications I found it decreased over time but now I am on 600 mg 3x daily. I have tried Lyrica and cymbalta but had side effects from them. Gabapentin is the only medication that works for me. It helps with the symptoms, tingling and numbness. Everyone is different and I am thankful I can tolerate gabapentin but over 15 years my dosage was slowly increased. Maybe that’s why.