I'm on the same dosage of gabapentin and also take 60 mg of cymbalta. If I miss either one I know it. Similar to you my pain levels increase as my body seems to adjust to the gabapentin. I did not find the cymbalta as problematic. The more gab you take the more likely you are to have cognitive problems and experience fatigue. I wish you good luck. This disease remains ever challenging.

@jakedduck1, @kp6350, and all...Hello, folks. Hello, friend Jake! I've been offline for a while due to medical and life issues, so it's good to see your post. Hope all is well your way, my 'co-chocolate lover'.
As to the Cymbalta, I still take 2/60mg capsules every morning. I was told at the beginning of the script to take it in the morning to get the most benefit. It might be helpful for me to take 2X daily, instead of 2 in the morning, and I'll ask the doc if he thinks that would extend the good effects. Also, I have since been told by my doc he can increase the dosage, my understanding I am at the maximum dosage is incorrect. But, he prefers to go in other directions at this time.
I still think Cymbalta is a wonderful drug and has/is a huge help for me to control pain and also help with anxiety/depression. I haven't taken Gabapentin for a couple of years now....Yea!
It is a good drug for some things for some people. It helped reduce some of my pain. But, I found it caused extreme brain fog, confusion, and cognitive issues that cleared up soon after I was tapered off it. The world brightened, I see colors more vividly, I think more clearly and I've found other methods of pain control.
So, listen to your body and be open and clear with your medical team. I believe we can improve in some way in our lives by continuing the fight and working with our support folks. Be blessed, Elizabeth