Took Gabapentin for 8 years, up to 3200mg per day. I was also being seen by oncologist for very low WBC count - 1.9. Many years trying to figure out cause. Finally, PCP asked me to chart all my medical data relating to pain meds and WBC count (Had records going back 20 years). There was a correlation between start of gabapentin and drastic lowering of WBC count. He and my neurologist recommended I taper off gabapentin and start Cymbalta. Two weeks after reaching zero on Gabapentin (took 8 weeks), had lab work done. Nurse called me today and gave me the good news - WBC count is now 4.4. Wow! Nerve pain level no better, no worse with Cymbalta.