Gabapentin is a medication that is used to treat neuralgia produced by the herpes zoster virus, popularly known as shingles. Post-herpetic neuralgia (PHN) is a kind of pain that may be severe and long-lasting. The gabantin 300 is also used to treat diabetic neuropathy, which occurs when diabetes damages nerves in the foot, resulting in severe searing pain. The actual mechanism through which gabantin 100 relieves pain is unknown. It has the potential to alter how the body perceives and responds to pain. Gabapentin is used to treat long-term (chronic) pain rather than acute pain. Chronic pain may make it difficult to sleep and function, as well as contribute to despair.