my partner gets an erection then goes limb, he's prescribed Gabapentin for back pain and was on a low dose he didnt have a problem with an erection then. he is on a higher dose now and finds it difficult with this and he's really worried it could affect our relationship. I was worried at first that it could be me, when I knew what the problem was I became to understand and told my partner not to worry. Gabapentin says the side affects can cause impotence, I need to know more about it. then I can discuss it with my partner.