There are other anticonvulsants that are more frequently used for nerve pain that would be less expensive. There are newer variations of gabapentin that might help; I've used Horizant (name brand of gabapentin that has a longer-acting mechanism) with a coupon & paid $100 per month for 2 doses/day. Lyrica is still under patent protection so it's only available as name-brand, but there is a coupon on their website that takes the cost way down. Between BCBS & the coupon, I only pay about
$50/month for it.
Otherwise, could your doctor get you some samples? Or have you checked out what the price would be with the Vimpat Savings Card? Here's the link if you're interested: https://www.vimpat.com/savings-support