@mrmacabre About two months ago I saw The Ojai Doctors on youtube. Three doctors, MD's, who give their opinions on health and medicine. They have all, on several different videos, said that gabapentin is in their opinion one of the most over subscribed medications. Since seeing that I have cut back, on my own, my dosage from 2400mg to 1200 to 1500, depending on the day. ( I am a 78 year old man with type 2 diabetes with mild peripheral neuropathy.) I just today started taking r alpha lipoic acid. I have found since decreasing the gabapentin dose than I am less drowsy and my balance is better. The peripheral neuropathy is no worse. I don't have any advice as to an alternative unfortunately. I wish you all the best.

@mrmacabre There is Aventyl, otherwise known as Nortriptyline, but it has side effects too. For me, it made my voice very hoarse and I had to go off of it. It might be another option for you though, if needed.