I've had diabetic neuropathy in my feet since 2005. I've taken Gabapentin 300mg ever since then and for the most part, it works. I've been told by my doctor I can take up to 2700 mg per day. However, I've run into some problems lately, if I take 3 during the day at once it will make me light-headed. If I take 2 or more at bedtime, they will help you sleep, but I will sometimes sleep walk. I've cut it back to one pill at bedtime and it's still working.
The medication works in your brain and nervous system. It stabilizes the electrical activity in your brain, and affects the way your nerves send messages to your brain. It's prescription, so see your doctor.