Medications for neuropathy

I am a 79 yo male who was diagnosed with neuropathy over two years ago. I have on pregabalin/Lyrica for some 18 months and had to increase dosage as the pain kept getting worse. Now I am on 450 mg daily which is max. My neurologist suggested that I try switching to Cymbalta. I also read that some patients are taking both pregabalin and Cymbalta. I would like to know if anyone has tried switching from Lyrica to Cymbalta and if that helped. Also would like to know if anyone is taking both meds and if that helped.