Gabapentin is a medication primarily used to treat seizures and nerve pain caused by conditions such as shingles (herpes zoster) and diabetic neuropathy. It belongs to the class of drugs known as anticonvulsants or antiepileptics. Gabapentin works by affecting the transmission of certain chemicals in the brain, reducing the abnormal electrical activity that can lead to seizures and helping to alleviate nerve-related pain. Additionally, it may be prescribed off-label for conditions such as anxiety disorders, restless legs syndrome, and migraines.