Husband is type 1 diabetic

Nicole
Hey ladies! My husband and I just found out last year that he has type 1 diabetes. Since we're not sure how long he's been diabetic, he's now struggling with neuropathy in his legs. He's on a high regimen of gabapentin and Cymbalta. We just started TTC a couple months ago, but I'm wondering if those medicines could mess up his fertility? If anyone has insight, it would be much appreciated!