Gabapentin 800mg is a prescription medication used to treat conditions such as epilepsy, restless legs syndrome, and nerve pain. It's also sometimes used off-label for conditions such as anxiety and migraines. Gabapentin is available as a generic drug and is typically covered by insurance. If you're interested in trying gabapentin, you can buy it online from a variety of pharmacies. Just make sure to do your research and only purchase from a reputable source.