Gabapentin 300mg 3Xday and Cymbalta 60mg daily is my combo of choice. I feel it has made a significant improvement in my level of pain. I have been taking it for 5 years and will probably take it for life (or so my pain Dr says.) No major side effects.
It did take several months to reach the desired relief of pain.
I still have flares of pains but know Gabapentin dose can be increased. I also rely on epidural injections, Tylenol, and Tramadol if a flare, Meds hot/cold packs and Lidocaine patches also help.
Good luck!